Honkai: Nexus Anima Bond Guide: How Bonding Works

Bonding in Honkai: Nexus Anima is the relationship system between you and your Anima, and it is the track that unlocks evolution. Through Bond Encounters and story moments, an Anima raises its Bond level; hit the right milestone and it becomes eligible to evolve into a stronger form. The short answer to “who should I bond first” is simple: bond with the Anima you actually field, because that is how they grow. This guide covers how Bond Encounters work, how the Bond level climbs, how it feeds evolution, and who to prioritize so your time pays off.

Note: the game is in closed beta (the Evolution Test, starting July 9 2026 on PC, iOS, and Android), so exact Bond thresholds, rewards, and encounter frequency below reflect current reveals and may be tuned before launch. Treat the numbers as illustrative and the framework as the durable part.

Key takeaways

• Bonding is the prerequisite for evolution, not a separate system. Raising Bond to a milestone is what makes an Anima eligible to evolve.
• Bond Encounters raise the Bond level through everything from small exploration moments to dedicated story beats, and they accumulate over time.
• Rewards arrive along the way, so bonding pays off before the evolution milestone, not only at it.
• Concentrate, do not spread. Bond the Anima in your active formation first; bench units can wait.
• Exploration feeds bonding, so playing the open world is directly progressing your roster.
• Exact thresholds are unconfirmed. Plan around the loop, not around specific numbers that may change.

What bonding actually is

Bonding sits alongside the two things every creature-collector player already understands: catching Anima and leveling them. It is a third, slower track, and it is the one that matters most for long-term power, because it is the gate to evolution.

Where a level rises from combat, a Bond rises from the relationship itself. You deepen it by spending time with an Anima, not just by winning fights with it. That difference is the whole design intent: the game wants you to have a handful of companions you genuinely invest in, rather than a warehouse of interchangeable units.

That framing also explains why bonding rewards concentration. A level can be grinded on any unit at any time; a Bond climbs only through accumulated encounters, so the Anima you engage with regularly pull ahead while the rest stall.

Bond Encounters: how you raise a Bond

A Bond Encounter is any interaction that raises an Anima’s Bond. These range from small moments as you explore the world to dedicated story beats built around a specific Anima. Each encounter nudges the Bond level up, and they accumulate, so the reliable way to deepen a Bond is to keep engaging with that Anima rather than waiting for one big event.

Every interaction with an Anima you field nudges its Bond level up.

Think of encounters in two buckets:

• Ambient encounters surface naturally as you move through the world. They are frequent, low weight individually, and they add up in the background while you do other things.
• Story encounters are dedicated beats tied to a specific Anima. They tend to carry more weight and often deliver the story content that fleshes out that companion.

Exploration (see the exploration guide) is what surfaces these moments, which is why the open-world half of the game feeds directly into roster progression. You do not have to choose between exploring and building your team; exploring is building your team.

Because encounter frequency is unconfirmed beta data, do not assume a fixed rate. Assume instead that consistent play with a chosen Anima beats sporadic play across many.

The Bond level climb

Bond level is a per-Anima track that rises as you accumulate encounters. The exact number of levels and thresholds are unconfirmed, but the shape of the climb is clear enough to plan around:

1. Early Bond unlocks introductory rewards and story context for the Anima. This is where you learn who the companion is and start seeing return on the investment.
2. Mid Bond continues the relationship and moves the Anima toward its evolution milestone. The rewards here are the progression perks that make bonding worthwhile in its own right.
3. Milestone Bond makes the Anima eligible to evolve, the payoff the whole track builds toward.

Because the climb is gradual, spreading attention thinly across your entire dex is slow. There are 84 Anima to catch, and you cannot meaningfully bond all of them at once. Concentrate on a handful and you reach milestones, and evolutions, far sooner than a scattered approach ever would.

Why concentration beats breadth

Here is the math in plain terms, without pretending we know the exact thresholds. If a milestone takes some fixed amount of accumulated encounter weight, then every encounter you spend on a bench unit is weight not spent on a core unit.

Split evenly across ten Anima, you finish nothing for a long time. Focused on three, you cross milestones on all three while the split player is still mid-climb on everyone. The evolved units are what actually change your win rate, so the focused player is stronger sooner.

How many Anima to focus on

There is no confirmed “correct” number, so use a rule of thumb tied to your formation rather than a fixed target. A formation fields nine Anima, but you do not need to bond all nine at the same pace.

• Two to three at a time is the tightest focus, and it reaches evolutions fastest. Use this if you want your carries and front-line anchor evolved as early as possible.
• Four to five at a time spreads a little wider while still finishing milestones at a reasonable clip. This is the sensible middle for most players building one Aspect team.
• Six or more at once is where progress starts to feel stalled, because no single Anima is getting enough encounters to cross a milestone soon.

The point is not the exact number; it is that a narrower focus finishes evolutions and a wider one delays all of them. When in doubt, err narrow, then widen once your core is evolved.

How Bonds unlock evolution

This is the reason bonding matters for power, not just flavor: evolution is bond-driven. Raising an Anima’s Bond to its milestone is what makes it eligible to evolve into a new form, sometimes with a changed combat role. Bonding is therefore the prerequisite for evolution, not a separate side system, and the two are really one loop rather than two tracks.

That has a practical consequence for planning. When you decide which Anima to evolve, you are really deciding which Anima to bond, because the bond has to come first. The decision happens at the formation stage, not at the evolution screen.

For what happens at the evolution step itself, including Chromatic variants and how an evolved form can shift a unit’s role, see the evolution guide. If you are still learning the broader progression order, the beginner progression guide puts bonding in context with leveling, catching, and the Level 18/21/24 milestone picks.

Bond-related rewards along the way

Beyond evolution eligibility, climbing an Anima’s Bond returns rewards at each step: story content that fleshes out the Anima, and progression perks that make the investment worthwhile even before the evolution milestone. That is what makes bonding a genuine early-game activity rather than a long-tail grind. You get value at each step, not only at the end.

This matters for how you feel about the time cost. A track that pays off only at the finish line punishes you for not reaching it. A track that pays off along the way rewards steady progress, which is exactly the behavior the concentration strategy encourages anyway.

The specific rewards at each Bond level are unconfirmed closed-beta info, so do not build a plan around a particular perk landing at a particular level. Build the plan around the reliable fact that bonding your core is never wasted, even if a given Anima never reaches its evolution milestone during the test.

Which Anima to bond with first

The prioritization is simple to state and worth being disciplined about: bond with the Anima you actually field.

Concentrate Bond progress on the Anima in your active formation.

1. Your formation core comes first

An evolved unit in your main lineup improves the team you run every fight. Decide what that lineup is before you commit bonding time, using the formation guide for row placement and the Aspect synergy guide for the synergy axis. Once the core is set, pour your encounters into it.

2. Your milestone 5-stars are natural picks

The Anima you lock in at Level 18, 21, and 24 (see the reroll guide’s milestone picks) are units you are already committed to for the long run. Bonding them compounds that investment, since the pick already told you these are the Anima your account is built around.

3. Bench Anima can wait

Bonding takes time, and time spent on units you rarely field delays the evolutions that would actually help your team. This is not a rule against ever bonding a bench favorite; it is a rule about order. Bench units come after the core, not instead of it.

Here is a quick decision table for a unit you are unsure about:

Question about the Anima	If yes	If no
Is it in your active formation?	Bond it now	Go to the next question
Is it a Level 18/21/24 pick?	Bond it soon, it is core	Go to the next question
Does it fill an Aspect synergy gap?	Queue it after your current core	Leave it on the bench for now

A worked example

Say your Level 18 pick was Mesmerith (front row), and you have built a Hate formation around it using the Aspect synergy guide. Your active nine includes Mesmerith, two more Hate units you catch early, and a backline damage dealer from your Level 21 pick.

Your bonding order writes itself: Mesmerith first, because it is both your foundation pick and your front-line anchor. Next, the two Hate units that hold your synergy together, since evolving them strengthens the exact team you already field. The Level 21 damage dealer follows, because its evolution protects your win condition.

Everything else, including that Anima you caught because you liked its design, waits. Not forever, just until the core is bonded. Draft and sanity-check that core in the team builder before you invest, so you are bonding the right nine and not reshuffling later.

Common bonding mistakes

• Spreading encounters across the whole dex. It feels productive and finishes nothing. Pick a handful and commit.
• Bonding before you have chosen a formation. If you do not know your nine, you do not know who to bond. Settle the team first.
• Chasing a bench favorite over the core. A favorite you never field is a slow evolution that changes no fights. Bond it after the units that carry your games.
• Planning around unconfirmed thresholds. Beta numbers will move. Plan around the loop (encounter, climb, evolve) rather than a specific level count.

How story bonds fit in

The Animaster-Anima bonds you see in the story, like Olympia and Noctumbra, mirror your own bonding loop rather than plugging into it. They are the narrative reason bonding matters: the world’s Animasters grow through their companions, and so do you. If you want that context, the Animaster guide and the lore primer cover the 19 Animasters and how their relationships shape the story. Treat those as flavor for your own loop, not as a second system to manage.

Bottom line

Bonding is how Anima grow in Honkai: Nexus Anima: Bond Encounters raise the Bond level, and hitting the milestone unlocks evolution. Concentrate on the Anima in your active formation instead of spreading thin, let exploration feed your Bond Encounters, and remember that rewards arrive along the climb, not just at the end.

Set your nine with the formation guide and Aspect synergy guide, draft the core worth bonding in the team builder, then read the evolution guide for what the milestone actually unlocks. If you have not started the beta yet, the Evolution Test sign-up guide and the Evolution Test FAQ will get you in the door first.