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Iirc Miko once, trying to gauge the other's reaction, said she had a "friend" who had sex with a girl before they started dating. The "friend" is not someone else as hinted by the other's reaction after hearing about it.
Miko has more experience and older interest in irl yuri. Does this make her a top? Not really, but it's more likely she'd be the one initiating when in the bedroom even though she's more passive outside. In the bedroom, it's Mikotop, outside, it's Suitop.
Anyway, they're really both bottoms so Mikotops and Suitops should just kiss and make up.