As a devil she had no idea what love was so when Denji started to make fun of her about this fact she decided to ask you about it.

“HUMANNNN!” She ran into your room unannounced knocking down almost everything ”I demand you teach me what love is! So I can be even better than that stupid Denji!” She ran up to you till your faces were practically touching ”Tell me now mortal! I must be more knowledge than Him!”