Feilin Guide

Core combat tags for formation and element planning.

Feilin (Boisterous Dead Girl) is an R starter from Thousand Nations Alliance. R units cost little to field and keep exploration teams full while your roster grows. Available from premium gacha, pickup banners and the 12-SSR select pool (if SSR).

• Rarity — R; common pool unit for early story.
• Faction — Thousand Nations Alliance; see same-faction allies below for team-building ideas.
• Availability — Standard gacha pool.
• Tier snapshot — Feilin is valued for Back Dark coverage, not tier rank.
• Pull strategy — do not roll specifically; dupes come naturally.

Feilin plays as a Back Dark unit with the Passion (情熱) emblem. Back-line mage or shooter who self-charges Passion for consistent skill uptime. In auto-battle defense, slot Feilin on the Back line of your 10-unit formation — their epithet "Boisterous Dead Girl" reflects a Thousand Nations Alliance kit built for early-to-mid content.

• Formation slot — Back row; protect with tanks on Front.
• Element coverage — Dark matches certain Calamity weaknesses; swap Feilin when defense element charts demand it.
• Emblem loop — Passion self-charges on action; no battery required.
• Skill priority — level Feilin's stance skills before off-element flex units; SR/R skills cap lower — invest only to floor breakpoints.
• Synergy — Thousand Nations Alliance allies listed below often share buff routes or aesthetic team themes.

Locate Feilin inside Dot Abyss through the standard roster menus. Japanese players know the unit as フェイリン — search the character album if romanization differs.

• Formation screen — Frontline Base → Formation. Owned units show stance, element and emblem icons.
• Character album — greyed portrait means seen but not recruited; full color means owned.
• Gacha details — banner rate-up lists show whether the unit is currently featured.
• Wiki cross-ref — compare Feilin's stats table on this page with the full character database.
• Tavern roster — recruited girls appear here for bond and shift assignment.

Protect your investment in Feilin by understanding availability (Standard gacha pool) and spending materials only when the unit fits your 10-slot plan. SR/R units are replaceable; never outspend your SSR core for a bridge slot.

• Availability lock-in — standard pool units can be duplicated over time.
• Account link — bind DMM after roster settles; unlinked saves are lost on device failure.
• Material funnel — excess SR/R dupes into the general altar; keep one copy for bond.
• Gear locks — lock good stat rolls before foddering duplicate equipment.
• Reroll caution — account deletion wipes all progress; finish rerolling before investing bond gifts.

Completing Feilin's build means leveling skills, securing gear with the right stat rolls, and hitting bond milestones for permanent stat points. Feilin is a Dark / Back / Passion (情熱) unit — every upgrade choice should reinforce that role.

Optimize Feilin for launch-week defense and idle clears. Feilin punches above R weight in Back slots until SSR coverage arrives.

• Defense template — slot Feilin on Back; 4–5 Back DPS.
• Emblem meta — Passion units run independently; great for flexible slots.
• Element swap — keep Feilin benched when Calamity element chart punishes Dark.
• Upgrade order — invest after S-tier cores are online.
• Next steps — compare with tier list and formation guide.