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I mean I had read one of the comics she mentioned. Chapter 55, page 47 when she thought about rearing a panda (=・ω・=). Panda from heaven wants hugs.
http://www.mangago.zone/read-manga/cute_princess_strikes_the_panda_from_heaven_wants_hugs/
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She may be lonely. But she wouldn't be so lonely as to dive into depression or depend on someone. I mean, she could get some female friends. ┑( ̄Д  ̄)┍ She doesn't have to find a lover or specifically you. Never thought that she only thought of you as a friend or a brother? You are her blood related cousin, she won't notice you especially when you did not even openly pursue her or straightforwardly tell that you like her (╯°Д °)╯╧╧
Who cares if they're handsome and talented. I rather the MC runs away and have a late romance in the manga than go with those guys
If she even end up with them, hope they change their ways towards her.
At least don't make her suffer since she doesn't seem like an M.( ̄∇ ̄")