Alright, so I'm going by 5's 4T, but in 5U, you can't seem to backdash from BT the same way. So, yeah, 4T is a little more viable, but with 6P+K not stunning on NH, can't do much with it.
Imo, Kokoro is not hard to win with at all. She has a good damage output, a good stun game, great mix-ups...