Yuzuki is a 2nd year in (schoolname). She transferred to school this year, and since she was the Student Council President in her previous school, she is super hardworking and serious, and an A+ student. She is often a role model to her classmates and the 1st years,  admired by a lot of them. She is very mature and serious, she can handle different situations very well. She’s quite intelligent, especially for her age.
...but that isn’t what she actually is.
The reason why Yuzuki is working so hard is because she wants to meet the expectations of those around her, especially the Nishikino family.
She’s been interested in science ever since she was young, which caused her to develop a passion for science. She likes to experiment and learn, but having no time for stuff she is passionate about, caused her to slowly became empty and mad as time passed, work was literally driving her insane. Though she wants to go on, she tries to be optimistic about everything all the time, and tries to help people and show them kindness, even if it’s a little. She can’t tolerate illiteracy at all, she’s showed her anger in public a few times before, and probably no one has the courage to make her mad ever again.
If the subject is science, her behavior slightly changes, which is the cause of rumors about her being a completely different person, a mad scientist with a really short temper.
The rumors aren’t completely false, since she has the nishikino family’s wealth, she has a lab of her own, and she can experiment with many different things, and try to invent new technologies. She aims to be a professional chemist.
Her small lab used to be the only place she could be herself, the only place she could show interest and be passionate about whatever she loves. It wasn’t just science at some point. She tried out many different things in her lab, and she claims that science changed her life.
This was until she heard about a 1st year called Ray talking about a vampire themed idol group.
When she first heard about Kyuketsukiss, she thought it was dumb and she had no time for it, even though a part of her said she would be a great idol. She decided to try it out, and she realized that, when she spends time with Kyuketsukiss members, she feels the most comfortable. Kyuketsukiss is like a place where she can be herself, and where she can break her limits.
She uses a different persona which she describes as “her inner demon” during idol activites,  she’s a completely different person on stage.
When asked, she claims that she uses her vampire/scientist persona to escape from the real life’s responsibilities and such, but It’s actually who she is, who she likes to be, and how she likes to behave. She wants to hise that, and wants to be known as a serious student outside Kyuketsukiss, which is also why she’s insecure about some of her personality aspects. Being herself in Kyuketsukiss, it kind of helps her to accept who she is and love herself the way she is.
As an idol, she claims to be experimenting on different types of human blood, and she calls her fans (or everyone around her, really) “test subjects”. She has a mature and a little devlish/ flirty personality as an idol. Though if something goes wrong she gets super mad and might even end up whining like a kid.

yuzuki