Sebastian appears as the typical kind of gentlemanly butler. He is dressed in a full suit, including a pair of white gloves, and has his white hair combed backwards. His white moustache extends out from the face and wears a monocle on his right eye, and is not yet seen to be in any form of civilian clothing.
Sebastian is shown to be a very caring, calm and a loyal person, he guiding and giving Alice advice in difficult situations. He has been serving Alice since she was a very small child, thus he is able to understand her very well.
- He is the second butler serving for a Cure, first being Jii-ya/Sakamoto serving for Karen Minazuki also known as Cure Aqua in Yes! Pretty Cure 5 and Yes! Pretty Cure 5 GoGo!.