[quote=@Birdboy]
What is her personality like? I assumed she is very tricky and mischievous. So, having Drake be frequently frustrated with her but in a sort of endearing way could be fun. 
[/quote]

I was definitely thinking that she would be tricky and mischievous. She'd have a Devil May Care attitude, but if Drake and Mei were childhood friends, then Drake would know that her carefree attitude hides a heart of gold. Mei does care about the people around her, but she doesn't show it in order to not appear weak. I was also thinking that once she sets her mind on a course of action, there's no stopping her.