As a succubus, Memo isn't shunned by other races like his fellow Sarkaz. The extraordinary allure of his naturally beautiful appearance and his unique magic make most people treat him well.
But he has troubles of his own: quite a lot of people are hunting him. Succubi feed on people's life essence. If he stays beside someone long enough, he can acquire one of their talents or skills.
Then Memo leaves to find someone else. The people he leaves behind usually don't want him to go, forcing him to flee again and again.