In his demon form, Leonard is a ram with white skin and light yellow fur. His eyes are green and he wears a butlers uniform that is different from Baphoment's.
In his human form, Leonard has the appearance of a young adult. He has pale skin and green eyes, like his demon form. He also wore Chinese clothes because he had been to China before he appeared.
Leonard is incredibly prideful, as he always challenges Baphomet to cooking contests claiming he will win. He can also be seen as a sore loser when Baphomet beat him for the (presumed) upteinth time. He is also very persuasive because he convinced the four rulers of Hell and Gilles de Rais to be the judges and commentator for a cook-off between him and Baphomet.
Although he is loyal to Sytry, he has grown tired of always making sweets for him, which is why he studied Chinese cooking. Inspite of this, throughout the manga, Sytry receives sweets from him. However, Gilles later reveals that the sweets are just meant to act as a distraction or a bribe, although it is unclear if Leonard knew this or not.
Amon and Mamon • Baphomet • Eligos • Gilles de Rais • Gilgamesh • John Dee • Lamia • Leonard
Belphegor • Empusa • Lamashtu • Leviathan • Lucifel Rofocale • Pluto • Astaroth the Second • Behemoth
Adrian Swallow • Barton Twining • Bianca Clifford • Elliot Eden • Mary • William Wynn Westcott
Arthur Christian • Cassandra • Ernest Crosby • Tamar • Elizabeth Dale