Ellie is a mammoth who thinks she’s a possum. Thats right, a nine-ton possum! At least that's what she understands until when Manny meets her.
Lost during a cold winter night when she was a baby, Ellie took shelter under a tree to escape the storm. It was there where she met Crash and Eddie, and their mother. With her memories were too far away, Ellie had forgotten her origins, though she did remember again when she found the famous tree where she was adopted at.
Initially crazy, though with a strong character, Manny was struggling to seduce her and bring her to reason. But once the two get together, Ellie is a real protective mother who cares for each member of the pack as he was her family members.