|This contains spoilers! Please proceed with caution.
Spoilers from Episode 8, A Clockwork Heart and Captain Sky’s Pirates
He is Tsuzuru’s childhood friends. He first appeared in the story of A Clockwork Heart. He works at the Mizuno Enterprises, a leading firm in the entertainment industry with multiple agencies, theaters, and record labels and offered Mankai Company financial support.
He first met Tsuzuru during elementary school. Tsuzuru would often look after him. Mizuno would often read the stories Tsuzuru had written. One day, Tsuzuru wanted to buy a gift for his older brother’s birthday, but he didn’t have much pocket money. Mizuno wanted to give him some money, but Tsuzuru refused saying that you don’t need to buy an expensive gift to cheers someone up, instead put your heart into it. Mizuno later suggested that they could perform his stories for his brothers' birthdays, which Tsuzuru happily agreed to. After the success of their first performance, they promised to perform one for Tsuzuru’s younger brother too.
But this changed when Mizuno told his mother about Tsuzuru’s family situation. His mother wasn’t happy with them playing together and made him change school. After that incident, Mizuno had been ashamed of facing Tsuzuru. After spotting him again during the Winter Troupe’s showdown act with the God Troupe, he learned that Tsuzuru was a scriptwriter for Mankai, and checked out one of their plays.
Mizuno decided to write a letter to Tsuzuru and explained everything, as well as apologised. Tsuzuru was happy and showed that he truly missed him. They met up again after the play and Mizuno told him that he would always support him even when they were apart.
During the story, he gave Izumi and Muku a treasure chest that was left behind after his grandfather’s passing. Misumi went back to his house and threw a paper plane into Madoka’s room, telling him how proud of him he was.
Madoka and Misumi grew up in a distant relationship because of their father. When they were younger, his father told him to stay away from Misumi so that he wouldn’t end up being just as weird. Although, Madoka appreciates Misumi even if he doesn’t show it. Misumi describes him as very smart but can be cold to people.
When Citron returned to Zafra, Tangerine was the first one to figure out the plotting of his brothers to get rid of Citron. He also helped the Spring and Winter Troupe when they had to rescue Citron, and guided the people out of the burning theater.
In the end of Episode 8, the king of Zafra chose him to be the heir of the throne, due to the sabotaging of his brothers and Citron’s outing.
He is the oldest brother of Tsuzuru, and had his first appearance in Episode 8 - The Greatest Journey of the main story. He is very lazy and carefree, even so, he still cares for his younger brothers. Tsuzuru describes him as eccentric, as in bit of a character. He also appears to be a bit sly, after telling Itaru about how he bribed someone to get into a sacred place.
He works as a curator of fine art and travels around the world a lot. During the time they were in Zafra, he gave Itaru a Japanese sake because the people loved it, which later helped him and Chikage get pass some soldiers to rescue Citron.
He feels some shame after running away from the trouble at home and giving Tsuzuru all the responsibilities. Although, he is happy after learning that Tsuzuru has achieved his dream as a scriptwriter.