Is it possible to change a monster to a human ?

[Tony75]

I want to use the Succabus sprite on the Apanda guest and change him into a human . So far I used the sprite and it works but when she joins me she can't change jobs and she only has squire on the job sheet where you buy abilites what 's the steps or is there a list of unused human characters I could replace with out screwing up the story for Succabus ?