Ahh heck, this wasn't the kind of question he was expecting to answer. Asriel sighs slowly, rubbing the back of his neck as he looks up at the ceiling, trying to think about how to respond.

"Honestly, I don't think it's going to be easy to just give a good answer. The simple one is.. well, DETERMINATION, but I don't know if people have all that much of that in this world. You guys know the Frisks? Yeah. They do, I do, Undyne, definitely does. Papyrus has probably a little, too. Refusing to die. Never giving up, no matter what. When you have that much determination..."

Asriel kind of pauses, looking at the ground with a somewhat reticent expression.

"Well.. you get to call the shots."