Core strengths
Free starting character, solid Cosmos damage, easy to build, good for learning game mechanics, viable in early-to-mid game.

NTE character build
Free protagonist character available from the start. Decent Cosmos damage dealer that can carry through early and mid-game content.
Free starting character, solid Cosmos damage, easy to build, good for learning game mechanics, viable in early-to-mid game.
Cosmos/Solid-based attacks with balanced damage profile. Ultimate deals moderate AoE Cosmos damage. Passive increases damage based on story progression.
ATK% / Cosmos DMG / Crit Rate. Balanced DPS build, not worth heavy investment. 4-piece Cosmos set.
Esper Zero is a B Tier S-Rank Cosmos/Solid Esper whose main job is damage / burst dps. Free protagonist character available from the start. Decent Cosmos damage dealer that can carry through early and mid-game content. They work best as a budget or bridge option while you save materials for stronger long-term carries.
The rating is based on practical account value rather than raw damage alone: role compression, team fit, element coverage, and how expensive the character is to make useful. For Esper Zero, the standout points are free starting character, solid cosmos damage, easy to build, good for learning game mechanics, viable in early-to-mid game. Their free-to-play access makes that value easier to recommend for newer accounts.
In combat, Esper Zero plays as a damage option with Cosmos element coverage and Solid arc typing. Cosmos/Solid-based attacks with balanced damage profile. Ultimate deals moderate AoE Cosmos damage. Passive increases damage based on story progression. This makes them easiest to justify when your team already supports that damage type or needs the utility attached to their kit.
Recommended teammates are Hotori, Chiz and Edgar. If you do not own those exact characters, look for replacements that preserve the same jobs: a stable damage source, a way to amplify Cosmos output, and enough survival or control to keep rotations consistent. For ready-made examples, compare the best NTE teams.
Start with ATK% / Cosmos DMG / Crit Rate. ATK% / Cosmos DMG / Crit Rate. Balanced DPS build, not worth heavy investment. 4-piece Cosmos set. Do not over-farm perfect substats before your core team has usable gear; a stable baseline build usually gives more account progress than chasing one ideal piece.
Prioritize Esper Zero when your account needs a damage or when Cosmos coverage unlocks a better team shell. Based on vote trends, community sentiment is fairly balanced. Use that as a signal to test the character against your own roster instead of treating any tier placement as permanent.
For broader comparisons, return to the NTE tier list or review the ranked NTE best characters page before spending scarce upgrade materials.