Himeko Nova wants a build that supports both her own Ultimate sequence and the party Assist Skill cycle. The community consensus starts with A Star That Lights the Night, As Navigator Isee Sees It, Fallen Star Anchorage, and a Critical Rate-first stat plan. Those recommendations are not interchangeable decoration. The light cone rewards Assist Skill usage, the relic set rewards Skill and Ultimate use, and the planar set pays out when a second Trailblaze Companion is in the party. Build her around the protocol team you will actually play.
Best light cone: A Star That Lights the Night
A Star That Lights the Night is Nova’s 5-Star signature Erudition light cone. Its First Wish passive ignores 32% of target DEF at Superimposition 1, increasing to 48% at Superimposition 5. It also returns 6 Energy whenever the wearer uses Assist Skill and grants Sail for two turns. Sail stacks up to three times. Each stack raises Assist Skill damage by 20% at Superimposition 1, and at full stacks the same per-stack bonus also applies to Ultimate damage.
That package matches Nova’s rotation from three directions. DEF ignore improves every relevant hit rather than a single skill line. Energy return helps reach a 150-Energy Ultimate. Sail reinforces the two damage events that define her kit: the shared Assist Skill command and the beam-plus-pulse Ultimate. A light cone that improves only ATK or only one action type can still work, but it does not cover the same loop.
The Seriousness of Breakfast is the dependable budget alternative in current community recommendations. Its ATK-focused stacking is easier to use than an unverified niche option and does not require a special team. Do not build around Into the Unreachable Veil or Eternal Calculus from this guide yet. Their names and exact recommendations appeared in a single secondary report and need a cleaner cross-check before they should guide account resources.
Use As Navigator Isee Sees It
As Navigator Isee Sees It is the recommended four-piece relic set. Its two-piece bonus grants 12% ATK. The four-piece bonus increases Skill and Ultimate damage by 18% after entering battle or using a Skill. The effect can stack up to three times, then removes one stack at the start of a turn or after an Ultimate. Nova’s rotation naturally presses Skill to refill Assist Skill and uses an Ultimate with several damage events, so she has a practical way to maintain the set without distorting the team plan.
The set existed before Nova’s release, but that does not weaken the pairing. A good relic set does not need to be character-branded. It needs to reward the actions the character repeats. Here, the 12% ATK anchors baseline damage while the stacked four-piece effect targets the two large parts of Nova’s damage budget. Treat Skill as the maintenance action for both the protocol cycle and relic stacks.
Farm the four-piece set as a whole rather than stopping after two good pieces. Mixed sets can be useful during leveling, but a finished Nova wants the four-piece Skill and Ultimate bonus. The meaningful comparison is not a single high-roll relic against a low-roll relic. Compare complete Critical Rate, Critical Damage, Speed, and Attack totals after the full set bonus is active.
Pair it with Fallen Star Anchorage
Fallen Star Anchorage is the preferred planar ornament. Its two-piece effect grants 8% Critical Rate. At battle start, it gives an extra 32% Critical Damage if the wearer and one other ally have the Trailblaze Companions tag. This condition fits Nova especially well because the same group contains the characters who activate Verdict or Decimation. A party built to access a protocol often satisfies the planar condition without adding a strange fourth slot.
The Critical Rate is valuable because Nova already receives large Critical Damage from her Talent. A build that keeps adding Critical Damage while leaving Critical Rate low makes her multi-hit Ultimate inconsistent. Fallen Star Anchorage corrects that balance before relic substats are counted. The second Trailblaze Companion requirement also pushes the player toward a coherent team rather than a generic collection of the strongest individual supports.
If the condition cannot be met, the set loses part of its appeal. That is a team-building signal, not a reason to force an unrelated companion. Decide whether the account can run a protocol core first. If it cannot, use the best available temporary ornament with sound main stats and return to Fallen Star Anchorage when the team is ready.
Main stats and substats
Use a Critical Rate body, ATK% boots, a Fire DMG or ATK% Sphere, and an ATK% Rope as the default plan. An Energy Regeneration Rope can be considered when a specific rotation fails to reach the 150-Energy Ultimate threshold, but it should solve an observed problem rather than replace damage automatically. Nova’s Talent gives her Critical Damage, so the body slot normally works harder when it raises Critical Rate.
Prioritize substats in this order: Critical Rate, Critical Damage, Speed, then ATK%. The practical goal is to bring Critical Rate close to 100% after all active buffs, then stack Critical Damage without sacrificing the turns that keep Assist Skill available. Speed is not only a comfort stat. It changes whether Nova can press Skill before the team needs its next shared command and whether her Navigator’s Semaphore window lines up with allied Ultimates.
Flat stats and defensive substats are not useless on an individual piece, but they should not lead the finished build. Nova is a carry who gains from active attack turns, Critical consistency, and a maintained protocol. Compare relics by those goals, not by a single displayed score. A lower-score piece with Critical Rate and Speed can be more useful than a high-score piece that only adds flat ATK.
Trace investment order
Level the Talent, Ultimate, Skill, and Assist Skill before spending heavily on the Basic ATK. Talent is the source of Starblazer Visioscape, Toughness reduction flexibility, RES PEN, and Critical Damage. Ultimate contains the six Hyperluminal Particle Beams, Source Energy interactions, Orbital Annihilation Pulse, and three Final Hits. Skill restores Assist Skill uses and gives the party its damage window. Assist Skill is the party command that turns the field into actual damage.
The major traces are important after the central kit is functioning. Whither, the Last and First Men lets Nova use her own Assist Skill without consuming a use and restores 5 Energy at turn start if her uses are already capped. Hark! The Express’s Pulse Roars grants an Extra Turn to Trailblaze Companions other than Nova after they use Assist Skill. The Silver Rail, Hushed in Antiquity gives three Source Energy after Ultimate and improves Orbital Annihilation Pulse when Source Energy is already high.
Ascension requires Radiant Prominence and the Whimsy Wax, Dreamweave Steel, and Lucid Awl series. Trace upgrades also use Celestial Globe, Galaxy Framework, Cosmic Sandpit, and Vanquished Flow’s Reticence. Gather the materials with your actual trace order in mind so that Nova’s protocol loop works before small Basic ATK gains consume the same resources.
Build around a real team, not a stat screenshot
The build changes slightly with the selected protocol. Verdict teams make Nova’s personal damage and Ultimate damage more important, so clean Critical Rate and Ultimate timing are the first checks. Decimation teams still want Nova to deal damage, but they also benefit from multi-target hit patterns that reach the nine-stack free Assist Skill trigger. In both cases, the relic and light cone plan above remains useful because it rewards the same Skill, Assist Skill, and Ultimate cycle.
Do not sacrifice every Speed roll for Critical Damage. A delayed Nova can miss the moment when the party wants its command refreshed. Do not sacrifice every Critical Rate roll for a larger Critical Damage screenshot either. The six beams, pulse, bounces, and finishing hits create many chances for inconsistency to show up. The best build is the one that lands those repeated hits while the chosen protocol is active.
Once the core is finished, test it in the content where you plan to use her. Track Ultimate timing, shared-command availability, and whether the planar condition is active. Those observations give a better next relic target than copying a number from another account with a different team.