Christian

Christian is...

the sole boy present at Camp Discourse, and known for his quiet, kind, and caring personality. He's not particularly talkative, often having his nose in a book or writing in a notebook, but usually has good advice on the occasions he does speak.

"Christian is a good boy." - Christian, on Christian
Christian was nominally a member of the cast during the Season 1, but didn't really emerge as a distinctive character until Seasons 2 and 3. He is one of the younger characters, and can be a little awkward at times as a result. He also fond of challenging Ellie to video game matches. Despite being a boy, he does have the capability to cast spells, and still qualifies as a witch. Generally, the rest of the characters treat him as their collective little brother- sometimes finding him annoying, sometimes helpful, but always protective and supportive of him.

Behind the scenes
Early on, Christian was initially just thrown in as the token boy character, but the writers began to take advantage of his presence in later episodes and chose to develop him further.