"Don't underestimate me"
Even though Imi is technically 18 years old, after having been forced to act like a 10 year old, she acts childishly. She gets incredibly mad whenever people mistake her for just being a little kid or underestimating her power. She loves fighting, if only to prove that she is not just a little girl. She never gives up anything, and would rather die than give up. She acts though in front of people, but when she is truly afraid she will be honest with people and act like an afraid little girl. Even though she has vampire-like instincts, there are still some major parts of her that are human (for example her moral code).
As Imi is only a half-vampire, she has less advantages than other vampires.
She's fast, but only half as fast as other vampires.
She's stronger than most humans her age, but she can still be defeated by a stronger-than-average human that is older than her.
She has night-vision, but this will falter at times and leave her defensless.
She has fangs, but every once in a while these, as well as all of her abilities, will dissapear for a few days and she will be an ordinary human.
It also works the oposite way, though - every once in a while she will be a full vampire for a few days.
In adittion to these abilities, Imi always carries a sword or a knife with her. She usually carries the sword if she knows that she is likely to end up in a fight with someone, and the knife when she doesn't. This is because as her abilities are weak she never knows if her fangs might fail her. Therefore, by bringing a knife or a sword she can still cut humans and suck their blood.
She also carries a small first-aid kit with her at all times in a shoulderbag (usually together with her knife) that she uses on humans after they've fallen unconcious. As she still is a little human-like, she never wants to kill anyone if she can avoid it, therefore she tries to heal up the humans after having taken a drink from them.
Imi hardly shares her past with anyone as she is afraid it can be used against her at some point. When she was 10 some vampires broke into her house and attacked her and her family. A vampire was drinking from her when her mother stabbed the vampire. This shocked the vampire so he let Imi go. Imi watched half-concious as her family was killed in front of her eyes, and was hoping that she would be able to join them in a peaceful death.
However, not everything went after the plan. As the vampire had been cut off in the middle of the act, he had accidentially injected some "vampire poison" (similar to those of mosquitos, but for vampires) into Imi. It hadn't been enough to fully turn her, which caused her to be a half-vampire. She hates being a half as she is too strong to kill herself and join her family, but she's too weak to protect those she cares for.
Imi joined a vampire-coven after some time as she was unable to look after herself. She was taught how to fight, but as she was only half, she struggled being of help. Therefore, in most fights, she is "the distraction" or "the bait".