How did Kenjaku’s technique work any way, did they replace Gojo’s brain with Yuta’s(Kenjaku’s) brain or did they put Kenjaku’s brain on top of it? Also if rika ate Kenjaku Yuta should have one more CT Mahito’s idle transfiguration? Or consuming only works with the inherent CT? I wonder if Soul swap ability will somehow will play an important role in all of this.
- They replaced Gojo's brain with Yuta's. There's no room for two brains in there.
- Kenjaku didn't have Idle Transfiguration so Yuta didn't obtain it. Uzumaki only allowed Kenjaku to use the obtained CT once and he already did so immediatelly after getting it.
- It's possible Yuta does have Kenjaku's other CT's during these five minutes. That we do not know, but it's likely he will focus on Gojo's abilities for this fight anyway.
If he did soul swap training with Gojo it would explain how he prepared to better use his body and abilities, so I hope he did.