Asriel hasn't been seen much since the news of both Chara's and Frisk's disappearance, though it's probably safe to assume that he's out looking for Frisk too. While Toriel is resting, Asriel comes into view, walking towards the flight deck at a hurried pace. There's dark circles under his eyes, and a redness to them too.

"I just gotta check the transporter room. They're probably both playing a trick on me, heheh. It's not very funny, Chara and Frisk-"

He didn't lose both of them. He didn't he didn't he didn't he didn't didn't he didn't Chara can't be gone can't be dead again please don't go-