The only thing that puts me off about Matsu is that she's sneaky and way too forward. Kazehana is forward too but hers is a more flirtatious and seductive manner. I would half expect Matsu to suddenly scream "LET'S BONE!". Tsukiumi is just the very strong girl but very sensitive underneath and there would probably never be a dull moment with her.
Makes sense, I actually like that about Matsu.