Demon slayer yandere

KINA INFO (NRC)

hello! i was just going to take the time to fill you in on more information on kina if anyone was confused about the last couple of chapters. (nrc-not real chapter)

gender:female

birthday: may 4

age:14(after 2 year time skip)16

height: 5'5

weight:165 pounds

family: mom(alive in original world) dad(alive in original world) older sister (alive in original world)kina a.k.a mc(deadish in original world, alive in demon slayer)

personality:quiet, nice to an extent, has a small mean streak, observant sometimes, loves money and will always take a chance to make money. smart when they want to be ,caring and a little slow. she loves to avoid things or ignore things when it comes to love hoping its not true unless they confess or loos feeling because she struggles with showing emotion to people(she does that very often in this book)(personalities change, 1 word-trauma-)

backstory: kina was in a family of 4 kina,mom,dad and her older sister. she was the baby of the family but was loved by her family very much and she loved her family just as much. she was amazing in martial arts and was an average student getting principles honor roll every now and again. she had 4 best friends and was enjoying school life when during a funeral there was a shooter. she was seperated from her family while running and was trying to protect another kid younger than her from being shot but ended up getting shot herself because she couldnt run fast enough to fully escape. 

little things kina does: she like to observe how everyone interacts for a while to learn more about people, she will often buy small things that people she cares for like and will give it to the person so they can enjoy the thing together even if she's not good with getting to know people through words she is good with her actions. she gets very quiet when in a large group of people she doesnt know and will shut down mentally making her body go into auto pilot till she leaves the place and has no recolection of what happened the entire time. she likes nature and when around the people she cares for and in nature she's most happy and carefree

kinas likes and dislikes: she loves music and played multiple instruments.  kina likes all animals except for centipedes and large spiders and unexpectedly ants. she has triphobia (fear of repeating patterns that have bumpy textures)

unhealthy habits: she will often bite the inside of her mouth when she has to stop talking so she doesnt disrespect her parents (that was before she came to demon slayer) kina still does this when talking to oyataka sama but got discovered by oburani because of his snake and whenever she is called in to talk with oyataka-sama so is obani so kaburanmaru can slither onto your hand to distract you from doing that while talking. once she bit her mouth so hard that blood started to seep out into her mouth and it was coming out so fast that she couldnt just swallow it and when it was her turn to speak blood slipped out of her mouth in big droplets as she spoke making the insect hashira rush her to the estate only to discover she had bit a blood gland on accident. it took weeks for it to heal. if she cant bite her mouth then she will either pick her nails bounce her legs or scratch at her skin till wep marks starts to appear but never long enough to draw blood.

should i give kina a brother or not?
Also these are not personal habits only one of them is so dw.