Let me explain the crests: in my country (Portugal) Mimi has the crest of Innocence and Jou has Sincerity (Adventure) and Loyalty (Zero Two). I don't exactly follow my country's dub because I grew up with the japanese raws I found online, but I decided to follow it here.
1) Mimi has the "Junshin no monshou (純真の紋章 ) - crest of Purity
2) Jou has the "Seijitsu no monshou" (誠実の紋章 ) - crest of Loyalty/ Sincerity/ Reliability/ Honestly. Jou's crest is actually hard to translate in other languages.
I'm aware the U.S. version has different names for the crests, but I don't have reasons to follow it. I've watched this version once and I dislike the general changes of it. I'm sorry.
I hope this clear things up.