|Full Name||Tsukuba Yuuka|
|School|| First High School |
|Novel||Volume 16, Chapter 2|
Her relationship towards Miyuki is that of neutrality, non-interference. She not a rival like Ayako, not amiable like Fumiya, not as enemies like that of Katsuhige.
The person who did the seal on Tatsuya's powers through Miyuki was Yuuka's mother Tsukuba Touka. That's why Yuuka was a little concerned Miyuki or Tatsuya might have animosity towards her.
As for Yuuka herself, she knows she has no chance of victory against Miyuki alone and even less when Tatsuya is beside her, so she tries to get along with them instead.
Yuuka is supporting Miyuki to curry favor to the next head because Yuuka admits if compared to Kuroba or Shibata, the Tsukuba family's power is a rank down.
Yuuka doesn't understand why the elders from the Yotsuba clan treat Tatsuya poorly and no matter how much she ask her mother, she wouldn't tell her.
She knows about Tatsuya's accomplishments (during Yokohama incident, Okinawa demon and Taurus Silver) and laughs at their idiot uncles who dare to oppose him.
Before they arrive at main mansion, they are ambushed by Shibata Katsushige and his guardians.Yuuka was angry with Katsuhige's actions. In a war of words with him, she makes a sarcastic remark about Katsuhige's romantic relationship with his guardian, Kotona.
The servants at the Tsukuba side house who put Yuuka's cup down brusquely, were in stark contrast with Minami's naturally delicate mindfulness towards Miyuki.
Minami's actions trying to give Miyuki the milk pot is meant to get on Yuuka's nerve, but she chose to dampen out the irritation that was forming out on her mind with 'phew' sigh.