Clarissa (WA:XF) vs Arnaud (WA4)
Still, it's a good match since Clarissa positively *explodes* if Arnaud reflects Sacrifice back into her, and Arnaud has the right kind of durability for ITD Sacrifice - good HP. I don't think Sacrifice + Howling Shot is a KO here, so Clarissa has to either aggressively use Rob Turn a lot to try and get Sacrifice ->2 Howling Shots, or has to do Rob Turn-> 2 Sacrifices. The Howling Shot hype strikes me as the worst option - that's using Rob Turn more, Howling Shot can miss, arguably they're both in hex games where there's no guarantee Howling Shot will even line up on turn 1, etc. So Clarissa needs Rob Turn->Sac -> Sac, which will do the trick. However she has to have that opening Rob Turn work (75% chance), and neither of those two Sacrifices to be Reflected into her face (25% of that each time). So .75*.75*.75 = 42% chance of Clarissa victory.
I know that most people don't consider this, but if you assume semi-randomized turn init (which WA4 has, at least, and I believe XF has on at least some maps?), then any time where Arnaud lucks out and goes first is basically a sure loss for Clarissa, as Slow Down'd Clarissa has no choice but to Rob Turn like crazy and her luck will not hold out 'till she gets that double. If Arnaud goes first say 20% of the time, he's winning almost all of those matches, which would drag Clarissa's odds down even further.
It's a good match, but I'm not a fan of characters who get by spamming 70-80% accuracy stuff in the DL and having it work every time, so definitely don't feel too bad about voting Arnaud here.
On Levin vs. Chie:
No Persona 4, but I would like to point out that for those who allow Miori Shirts but also allow Defend commands, Levin's got a solid strategy in Blast->Defend->Blast. I assume Chie has to do something on her Power Charge turn or lose it, natch, and Blast is sorta-ITE. (Prevent can mess with its hit rate, but not much else, and other spells have lesser hit rates, though if you see magic evasion as entirely the defender's system, then Levin is out of luck here.)