- His full name is Harley Vance.
- Along with his sibling Lesley, and Gusion/Gossen, they are the only heroes in the game to have a full name.
- Lesley and Harley are adopted siblings, they both aslo have -ley on their name.
- There is a possibility that if they are in the same team, they are granted with a unique buff that gives 10 more HP to both of them.
- It is possible that similar small buffs will be given in the future to other heroes related to each other, such as Lancelot and Odette or Karina and Selena.
- He is one of the smallest heroes in the game. He is quite taller than Nana and Cyclops but quite smaller than Lolita.
- His name is an unisex name (it can be used on any gender). It is of Old English origin which means hare's meadow.
- He is one of the heroes to have a Royal skin (Royal Magister). Lesley and Lancelot are the others.