Headcanon that as soon as it said “red winter is here” everybody got transformed into their third life outfits.
Martyn and Ren looking at each other and seeing their third life selves and immediately being drawn to one another.
Grian seeing the Red King and his hand and not having Scar beside him so he joins up with them instead.
Cleo in their Crastle fit and not having Bdubs, Tango or Impulse so they join up with Dogwarts, who they had an alliance with right back at the start.
Jimmy and Scott sticking together, and Scott and Joel teaming despite their long-term rivalry.
BigB teaming with Joel, Scott and Jimmy because even in this life, the Blue Sword Boys can’t be together.
Also Gem, poor Gem, being all alone in her Christmas outfit still, not knowing where to go. Getting picked by Martyn and having a team chosen for her, cause she wasn’t there back then.