>>282033136
Let me recap all of Tenka and Yuuki's interactions before she decided she was head over heels in love with him and wanted to devote every waking moment of her life to worshiping him.

She appeared in the unit 7 dorms through a portal.
Yuuki says "Intruders!?", Himari explains who they are.
She praises the coffee Yuuki made.
She leaves, and the next time we see her she has decided she wants to take Yuuki from Kyouka, and from that point on literally everything she says or does in the series revolves around her obsession with Yuuki.

At least other girls took like, a chapter or two and actually went through some kind of experience with Yuuki before they decided they liked him. Tenka heard him say one word, which wasn't even actually directed at her, and that was all it took. And not only did she fall in love for the shallowest reasons, but she's the shallowest character in general.
Kyouka, Himari and Shushu like Yuuki, but they still retain their own personality, hobbies and goals in life that don't revolve around him. What does Tenka care about besides Yuki? What goals does she have besides Yuki? What are her hobbies besides Yuuki? None! Nothing, she's a non-character.