What about for the twins the 'other' Tendos, Kurumi and Natsumi?  Or
Shampoo's sisters/cousin/whatever, Pink and Link.  Both of these pairs have
fought Ranma as a tag team duo and P&L are twins...  Well anyway this looks
like a lot of fun, keep it up!!! :}

7th Angel: Mint and Lime (the only twin's I can't
think off)

Don't worry about the bullet with your name on it, worry about the one
addressed "to whom it may concern".