Yeah they fit well together. And Morriva may be big, but she's definitely a softy... not just physically either.
Now a few more pictures.
First, Kat and Aryanna have a habit of talking their friends into weird things. Sometimes its simple, like a quick costume change. Kat likes talking the new guys into trying on her outfit. Somewhat out of vanity, somewhat because she just likes being able to stare at other women in skimpy clothes, also because she just likes to see how it makes the less secure ones uncomfortable. So we see they've talked Morriva and Sonnya into trying on Kat's outfit. Jet, the speedster is wearing his special speed safety suit, which Kat, impersonating a police officer at the time, tricked him into a while back.
Next... what's better than Morriva, or Emily outgrowing a building? How about BOTH at once?!