Not a bipolar personality disorder.

LeiLei didn't bother waiting for an answer from Marvin as she looked back at Hecathe and beamed, "Sir, Raven said that I'll be able to join the guild after a small test!~" 

Hecathe blinked in surprise as he saw such a delighted expression on her face. 

He wondered if this girl even knew what that so-called 'little test' meant. 

"I'll try my best to pass it! I won't let you down!" The girl exclaimed with a wide smile on her face and Hecathe couldn't help but get the feeling that he had newly adopted this girl or something. 

The way she spoke and reacted... It really made him feel as if he was now raising her as a father. 

Marvin chuckled as he heard the girl and raised his hand to pat her head but was immediately stopped by Hecathe who lightly glared at the boy.