Seiichi Tsukishima is a male supporting character known as an incompetent library committee member whose personality shifts so drastically that he can seem like two completely different people.
Seiichi Tsukishima is a friend of Tougo Sakuradaimon.
When he is in the library or surrounded by books, he transforms into a strikingly handsome and polished young man.
In that mode, he speaks in dramatically suave, theatrical lines.
The change is so extreme that Poemu Kohinata jokes that he is practically some kind of monster.
Public Persona
While in his "handsome mode," Seiichi comes across as cool, charming, and effortlessly stylish.
His refined appearance and manner make him look like a classic heartthrob.
He also has a habit of delivering overly polished, flashy remarks.
That affected way of speaking adds to his image as a self-conscious pretty boy.
Behind that attractive exterior, Seiichi has a scheming and rather mean-spirited side.
His good looks in the library do not reflect a purely noble personality.
Outside of his handsome mode, his usual state is much gloomier.
He becomes a sullen, introverted complainer who constantly mutters gripes and insults under his breath.
Dual Nature
Seiichi's contrast between modes is one of his defining traits.
Around books, he becomes an improbably perfect-looking charmer; away from them, he sinks into a bitter and awkward dark mode.
The difference is so pronounced that people could easily fail to recognize him as the same person.
That absurd gap is a major part of his comedic appeal.
Seiichi is friends with Tougo Sakuradaimon.
Their connection places him within the story's core group of characters.
He does not get along with Yū Izubuchi at all.
The two are complete opposites and have a relationship like cats and dogs.
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