I wouldn't include lilyhops as a counterexample, since he sounds fucking weird. Don't recall if I've ever listened to Clio. Sena just sounds like a normal woman to me, although low mic quality may obscure things a bit.That's my initial thought. But I also think Clio sounds like a woman and their dispute about that not to mention Lilyhops.
Say, people were speculating that Sena may be Kirsche. If so, does this reveal a connection between Kirsche and BPMCarl?