Sunday is a man with fair skin and yellow irises with purple pupils. Sunday has wavy greyish-blue shoulder-length hair with a fringe swept up to the left. Sunday has angel wings behind his ears and a halo behind his head, which represents his Halovian heritage. Sunday is amiable and kind. However, beneath this façade, Sunday's true nature is far from benevolent. Sunday has a need for control, deriving pleasure from manipulating the thoughts and actions of others.