Weird to see that no one created a thread about this. Anyways (Stolen from Reddit from PM1)
I feel like rolling the dice and going for red, a 1/19 (5%) chance to get Female Byleth and merging her to +7. Probably going to pull for red, lifes a gamble anyways.
Green seems the best choice as Julia and Deirdre are quite great units, and Hector obviously has DC. Plus, you could get a merge on Deirdre with those Heroic Paper things, no clue what they are called.
Blue is also a gamble, there’s Tsubasa, then some great units such as Micaiah, etc and then there’s units like Robin and F Corrin lol.
Colour wise: Green>Red/Blue>Colourless
Which Colour are you going to pull?