Citrus puts on a false face of kindness and charm when tricking his prey, but his real personality is shown to be much more stern and murderous.
He will go to extreme lengths to make sure he catches his victims, and can be extremely vicious and determined when this happens.
This is seen actively with Spool, as he feels less of a need to keep his facade up around his survival partner, cold and unkind to him usually.
He seems to oddly hate himself for his need to consume others souls, and the fact that he is, and will always be, a monster. It's clearly not something he enjoys. Although usually not great towards to his survival partner, he feels a loose sort of affection towards Spool, and is seen growing more warm towards him as time goes on, even admitting that he thinks Spool is attractive.
Speaking style
Speaks in quick, baiting one-liners; answers questions with questions; often misdirects and then undercuts with a sudden serious aside.