Jade
Rainbows, color, celebration, love, people, dancing, music, parade, food, this is Matthew's JAM. He has like, next to no shame too and loves Blue dearly so he was agreeable to whatever she suggested. Unsurprisingly, because it's Matthew, there were hugs for literally anyone and he TOTALLY means everyone and also really did mean he would be with anyone who didn't have someone to walk with!
Annnnnnnnd actually hiding in the shadows like some sort of Batman (because he hates color and groups of people) was Diego! Who was there to make sure that no one was giving participants a hard time, the thing he hates more than color and groups of people is bigots so just in case he was all lurking in the background ready to punch homophobes in the face.