Usually 2-5 I'll actually play a good amount to the point where I learn to play them well. Though I'll play "most of the cast" from time to time. There are always a few characters I just hate and don't touch at all, but yeah.
How many are high tier is completely random-- I just play the characters I like as characters. Beit cause they're really cool in their story modes or because they're fun to play or whatever.
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No problem!
This is a cute and pop genocide of love!