Mostly expressionless, but loves making jokes.

Coralie 6626 Planck is a member of the Mars exploration team alongside her partner Erdős Helia. She is the adopted daughter of Lieserl Albert Einstein, who gave her the surname "Planck". Just like Einstein, Coralie achieved a doctoral degree at the age of 17.

As a result of Honkai mutations, Coralie was born with flat dog ears and a tail. This also caused her physical development to halt prematurely. She fights with an massive, explosive hammer.