After Pippa, I would say Lia is the strongest candidate. The probability drops off hard after Lumi and Yuri. Yuri.. she makes some
weird fucking noises, reminds me of that troon deerkin janny (over on Twatch). Lumi's synesthesia and I recall her describing frequent sensory overload, would not be shocked if she had more of her CNS "wired wrong."
The rest of them are just awkward (sheltered in Airi's case) weebettes and/or NEETs.
Buckyus-chan..