Chris

A human and Sooha's childhood friend. Despite passing away at a young age after being killed by a vampire, Sooha appeared to see him after transferring to the Decelis Academy.

[Spoiler] Then, Dardan takes his form so he can persuade Sooha, who is the reincarnation of Selen, the princess he is obsessed with. [/Spoiler]

(Source: Dark Moon: The Blood Altar Wiki)