Well...
Aspen is my main MU, I went into her details in another thread but personality-wise she's playful and mischievous, but also feels like she's constantly overshadowed, and is very unsure of darkness and such, because it keeps calling out to her.
She's marrying Hinata
Lara is the only other MU I've fleshed out, but that's only because she is based on my Awakening avatar. basically she's very, very intelligent, but closed off to the world and comes off standoffish and almost cold to others
She's marrying Kaze because 1) I like Kaze a lot and I was planning on marrying him anyways and 2) I realized that my avatar married Stahl in Awakening, the green knight, so I guess she's got a thing for green
this was disorganized sorry