Please see below possible future peerage and please supply your suggestions in the comments and how he might acquire and convince them to join his peerage.

MC will be both visiting worlds and summoning his peerage members.

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Queen - Android 18 (Dragon ball z)

Bishop -

Bishop -

Rook -

Rook -

Knight -

Knight -

Pawn - Sheego (Kim Posible)

Pawn - Hinata (Naruto Shippuden)

Pawn - Fluer (Harry Potter)

Pawn -

Pawn -

Pawn -

Pawn -

Pawn -