Asriel has long ears, a snout, and visible fangs.  He wears a green, long-sleeved shirt with yellow stripes and black pants, similar to Chara's clothing.  He also has a small wisp of fur on his head and lacks horns.  Asriel was a docile, unadventurous, and loving child.  He cared for Chara as a sibling, and he trusted them when they came up with a plan to escape the Underground that involved them consuming buttercups.