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Fio-chan (Big O Pants)

"bird tail""red eyes""hair between eyes""red hair""long hair""black wings"

Want to collect, style and chat with Fio-chan (Big O Pants)?
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Fio-chan (Big O Pants) is a character from Original. fio-chan (big o pants), original Collect Fio-chan (Big O Pants) as a gacha card on Waifumaster, chat with Fio-chan (Big O Pants) as her own AI persona, and trade duplicate cards on the player-to-player marketplace — free to play.

Chat with Fio-chan (Big O Pants)

Fio-chan (Big O Pants) has her own AI chat persona — she replies in character, remembers what you tell her, and adapts to the tone you set. Sign in to start a private, one-on-one chat with Fio-chan (Big O Pants).

💬 Chat with Fio-chan (Big O Pants) →

How to collect Fio-chan (Big O Pants)

Rarity · Rare (R)

Pull her from the character gacha — soft pity kicks in at 50 pulls and a top-tier card is guaranteed by 60, so unlucky streaks still pay off.
Raise her mastery by pulling duplicates (N → R → SR → SSR → UR). Each tier unlocks a new outfit, pose set, and expanded chat memory for Fio-chan (Big O Pants).
Skip the grind — buy Fio-chan (Big O Pants) straight from the player marketplace or the curated Trader shop with 🌸 hearts.
Style & chat — once you own Fio-chan (Big O Pants) you can restyle her outfits and talk to her one-on-one as her own AI persona.