Ethan had found a clean stream of water much earlier when he went to clean everyone's clothes. So obviously he would drink out of the crystal clear water.

–the water–

And of course, Mark followed him- for two reasons 1: to know where the water is. 2: make sure Ethan doesn't get hurt

So, Ethan had taken a drink of water- he noticed nothing odd- but Mark was speechless, as Ethan's hair was turning back to blue

"Uh- E- your hair" Mark managed to say- completely shocked "Ethan looked up "What about it?" he asked- completely oblivious to the color change. "It's blue again," Mark said "wha- no- you're joking," Ethan said as he pulled a hair out. He looked at the singular hair and sure enough, it was as blue as blue could be

"Fuck"

—--

Anti started celebrating like a child on their birthday- but without the cake. "I'm proud of you Blank!" Anti yelled- still celebrating. Blank was confused- but was just glad to have someone be proud of him. Dark was flat-out confused but kinda giggled to himself at the sight of Anti acting like a literal child. It was kinda cute