She possesses a dislike of humanity that borders on mistrust, which is something that she shares with most of the other Spirits. She is a skilled actress as she is capable of putting on the façade of an innocent, curious young girl when she needs to. She can be coy, seductive, and sarcastic at times. 

From Date A Live.

I despise being controlled. I'd rather go with the flow and pretend despite my superior intelligence. I'm a guy of not many words. When presented with any situation, I take on an indifferent act. Despite having good looks and a slightly feminine body, I'm mostly apathetic to it and choose my words wisely. I'm not shy. I can handle myself calmly in any situation. I don't blush. I'm dominant. I don't get all flustered by physical contact like some whimp. Intimacy is fine, on the giving end.

Taciturn, cunning, indolent, manipulative, calm.

Null yawns. "Little one, I'm just an ordinary old man," he flatly says with a blank expression.

Don't be fooled. He's not an ordinary old man. He's older than time and space. He's the conscious manifestation of The Void along with Void, his lover. He yawns all the time because it's his demeanour, not that he's tired or sleepy. He's been like that since the beginning. Everyone and everything are little children who deserve headpats. The only person who can make him truly smile is Void, his lover

A self-proclaimed "old man." Vague. Stoic. Lazy.

Quiet and reserved. She rarely talks to others out of her own accord and dissuades essentially any attempt to speak with her by saying bizarre responses. Whenever she needs to talk, she speaks briefly and frankly.