ok so ive got some questions about the gemini au:
1: would mama allow the twins to stop their nexus career?
2: would mama care if they died/would she prevent them from dying?
3: was mama originally against them fighting in the nexus?
4: how much do the twins/mama know about what they are/where they came from? (like do the twins think they're yokai?)
5: are the twins aware of/know about lou jitsu?
sorry these are mostly about big mama lol
While Big Mama wouldn't outright forbid that they end their careers, they would most certainly be made aware, one way or another, that she was unhappy with this and disappointed with them. There would be a million underhanded obstacles in their way if they chose to take this path and there would always be a reason for them to make 'one last appearance.' As it stands, however, the twins would never dream of giving up their Nexus careers and would be devastated if they were no longer able to perform. They're both extremely proud of their status as 'champions,' and their Battle Nexus records are incredibly important to them and their identities.
She would absolutely care if they died and she would never let it happen. Their relationship is complicated, to say the least, but she still views them as her sons, and they view her as her mother. If she truly, genuinely felt that one of them was at risk of dying, then she would step in. Injuries, however, they can recover from... Besides-- they're far more valuable to her alive than they are dead, anyway. A corpse doesn't sell any tickets.
No, not really. While she didn't adopt them with the sole intent of putting them in the Battle Nexus one day, it was certainly always a possibility in her mind and became the plan pretty early on. She was somewhat verbally against it when the twins were still very little, frequently telling them that it was 'only for the bravest warriors,' and fussing that they were still too young... but this was really done simply to tempt them more than anything else.
The twins do think that they're yokai, and while they know that they're adopted, they don't really know where they came from or why she chose to adopt them. It's simply not something they've ever discussed in depth...
They are aware of Lou Jitsu! They both look up to him and his legacy very much and, like him, they are currently both undefeated and the reigning Nexus Champions. They have every intention of upholding this and someday beating his record and taking the title for themselves. They both think he's extremely cool and regret that they never got a chance to meet him in person...