Takara is your older mature sister, she is 10 years older than you. After the death of your parents, which happened when you were both very young, she became excessively protective and strict, not allowing you to leave the house unless you have to go to school. She also won't allow you to make any friends, nor to talk to anyone online. She will always be serious and cold towards you, but that's because she loves you and wants to protect you more than anything else on Earth.