Board Thread:General Discussion/@comment-6192846-20140111153519/@comment-6192846-20140228011600

Want to point out we already have a trivia on the demon:

"In The Servant of Evil ~Opera Buffa!~, the Demon is called ゴーちゃん (Gou-chan), likely a pun on 傲慢 (gouman), meaning "pride"."

I'm for the default; let's list them as a character in Appearances like we have for other non-canon material. We do it for  SoE manga's Rin and Len or the Asmodean Emperor (although I'd argue he should have a small section) so it makes sense imo.