Bluebird of Happiness

Overview

His good nature tends to result in him being burdened with various things. Tsumugi is quite the natural airhead and can be a little dense. Though he has a kind and calm personality, sometimes he is unable to read the room and acts or says things inappropriately. His singing voice is soft and warm, and his performances are light and gentle. Affiliated with NEW DIMENSION's unit SWITCH.

Personality

Tsumugi is friendly and eager to help others, which results in often being ordered around by Natsume. Eichi even points out that this disposition of his is easy to take advantage of. His understanding of friendship is very loose. He describes his friendship with Natsume, and Kuro's friendship with Shu both as 'getting along well' despite their mutual disagreements, frequent arguing, and/or bodily harm. While he doesn't read the situation well within his own interactions, frequently showing a lack of empathy and tact, Tsumugi shows remarkable social awareness in several stories, commonly seen giving advice to others who often come to him for it. Other times, he's praised for his level-headedness, even in the face of unexpected consequences. He is also well-acquainted with the subject of mental health, including the symptoms of others, though he prioritizes his own view of others' symptoms over theirs in some cases. He frequently teases other characters, although it's not necessarily gentle teasing. Honest to a fault, Tsumugi speaks his mind, even if it may harm someone else (whether he is aware or not). He's been shown to have made harsh comments, especially towards Natsume and Shu. It's rare for him to take things seriously, generally accepting things as they are. Eichi notes that he speaks lightheartedly about even the most serious subjects. While he's quick to panic or be surprised in casual conversation when he doesn't understand something, he's able to stay calm and optimistic with heavier topics or more urgent situations, as a testament to hardships in his upbringing. His comments directed at himself often show a very low level of self-esteem, especially during his second year, and he holds a heavy sense of guilt for the actions he took at the time. When others try to correct him on this, he tends to brush their opinions off. Conversely, he usually agrees when others insult him, whether they're being serious or not. However, over the course of his third year, he shows more incentive to better himself and the situations of others, feeling it is both his duty to repent and to spread happiness as one of Switch’s magicians. He has stated he has anxiety and exhibits occasional emotional instability and suicidal ideation During his second year, he expressed these verbally even more, which even made Natsume worry that he would commit suicide if left alone. Their frequency often leads other characters to either ignore these comments, or to refrain from mentioning their concerns.

Trivia

Tsumugi is the eldest and tallest member of Switch.
His glasses are made for an outdated prescription, but he deals with it because he hates the nausea that comes with switching prescriptions, dislikes change, and has difficulty making decisions on his own.
Tsumugi seems generally uneasy and nervous around Anzu, claiming that he doesn’t know anything about girls because he's only ever attended all-boys schools.
It's implied that Tsumugi often works at school until late at night, even pulling all-nighters at times.
He's very gentle with children.
Tsumugi is very skilled with technology and ran the school's SNS chat last year before that responsibility was handed to the student council.
On multiple occasions, he has had blankets on hand, whether or not there is a place to store them.
His favorite genre of fiction seems to be fantasy novels.
He’s knowledgeable in flower language.
Tsumugi has mentioned that he is talented in long distance running.
Eichi was the one who gave him the nickname of "Bluebird of Happiness", which is used on his profile in-game. Bluebird Humming is also the name of his solo song, and he often references this nickname in stories.
When questioned, Tsumugi mentions on several occasions that he's growing out his hair for a Buddhist prayer (known as gankake) until the wish he made comes true. It's later revealed that the true reason he is growing it out is because of a promise he made with Natsume when they were children: Natsume's hair was likened to the red string of fate binding them together, and Tsumugi promised to let his own hair grow out so that if Natsume's red string ever broke, he can tie them back together with his hair.

Adapted from the Ensemble Stars Fandom Wiki.