I see what you mean. Yeah, I agree with you there. Or have it be Mercury, Emerald, and Neo, and let Tyrion commit atrocities in the background where he can actually commit atrocities.
Bah and humbug! Gender does not need to be restricted to two solo binary roles! The dudes can be female, the bride a male and yadda yadda yadda. And clearly the rainbow thingy is a callout to the LGBT community and a hint to the Maiden's unorthodox gender. It's also why team evil can't find the Spring Maiden, they aren't looking at the right people.
(Actually what Rainbow Thingy? I can't remember one, but someone mentioned it. Also I would laugh pretty hard if I was actually right.)