None of the above. Crow isn't suited for it, and Ana already denied it. Shin has no obligation or interest to take the position.
The only half-decent candidates would be Shiro-4 or Eris.
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GoldenKnight_0pineapple 🍎 - old
I think for the other one he doesn't remember is Shiro 4 -
Yes that’s the one thanks :)