Seeing Genshin have Heizou and Wriothesley,Honkai Star Rail have Luka and Zenless Zone Zero im thinking that Ananta need a Boxing theme character (Male or Female is good) that their weapon is like a Boxing glove the skill will be like them doing dempsey roll from Hajime no Ippo
The Activity is were you can Fight npc or any of the Playable characters in a Boxing Match (You can also Play as the Playable character you fought in the fight)
The Char Customization (if it added)
Is Boxing gloves,Boxing Trunks (For Male and Female Mc but for some part will only exclusive for female mc),shoes etc etc