Hiiro Amagi

A newcomer who has no knowledge whatsoever about the idol industry, yet aims to be an idol. He has an optimistic, naïve personality, and he tends to overdo it with how passionate he is. He is Rinne Amagi's younger brother. He has a side of him that causes him to get ahead of himself and follow his emotions over logic. He sings from the heart, making his performances powerful and clear.

Hiiro is a member of Starmaker Production's ALKALOID.

Appearance
Hiiro is of average build, and has curly red hair and cyan eyes, like Rinne.

His ALKALOID appearance is consisted of a blue and black shirt, white pants, black boots with gold accents and a black jacket with red, white, blue and gold accents. There is a golden spade shaped medal on his left lapel, a blue and black ribbon hanging from it. A black hat sits on Hiiro's head, with the ALKALOID logo set in blue on the hat. A white belt with red and black diamonds sits on his waist. The outfit is completed with black wrost length fingerless gloves.

Personality
Hiiro is a naïve and straightforward boy. Due to his background, he is not very familiar with the societal norms of the city, and often acts overly familiar with others.

He is inquisitive and enjoys learning about his new surroundings. He tends to take things literally and act on impulse.

Hiiro is very passionate about achieving his goals. However, he has a one-track mind and often develops tunnel vision because of this, something his brother scolds him for.

He is an extremely quick learner and is often regarded as a genius by his peers.

Etymology
The kanji in Hiiro's surname, 天城, can be translated as "Heaven's Castle". The first character of his first name, 一 (one), might be a reference to the ace playing card. The second character of his first name, 彩, refers to color, often vibrant color. His first name also sounds like the word 緋色 (hiiro), which means scarlet.

Trivia

 * During the Main Story, he shared a room with the rest of ALKALOID at Starmony Dorm.
 * He currently shares a dorm room with Hinata Aoi and Niki Shiina.
 * According to a 4gamer interview with Akira, Hiiro's character archetype is "an idiot, for better or worse" (良くも悪くもバカ).
 * Hiiro is naturally intelligent and one of the top students in his grade. Other students, including Aira Shiratori from his unit and Knights' Tsukasa Suou, feel threatened by his results and how easily he seems to achieve them.
 * He is the second tallest of the second years, just five centimeters shorter than Midori Takamine.
 * A running gag related to Hiiro is his love for omurice.
 * It begins in Troublemakers when Hiiro exclaims how tasty food in the city is, specifically remarking on the tastiness of the omurice he ordered at a family restaurant at Tomoya's recommendation.
 * The omurice trend continues in stories following thereafter, as Hiiro starts being associated with omurice by his peers. Several characters comment on how he always chooses to eat omurice, and Hiiro mentions in Feather Touch that Niki Shiina (who works at the staff cafeteria at ES) started making him omurice before even taking his order, recognizing omurice as Hiiro's go-to dish. Hiiro usually follows up on these comments with praises for the dish, saying that it's fluffy and charming, and explaining that he feels happy whenever he eats omurice.
 * The gag is included in the Bkubstars comics as well. An example of this is very similar to a scene from Merry Xmas : in both scenarios, Hiiro and Aira are eating lunch at the ES cafeteria. Hiiro resolves to choose something other than omurice and takes a long time trying to decide. In the comic, he ends up distracted by someone else's order of omurice, with Aira yelling at him to just give up and order omurice.

Voice Actor Comment
"This is Gakuto Kajiwara, playing the role of Hiiro Amagi! This my first time recording for not only Alkaloid, but Enstars as a whole, so I was super excited!! I'm really looking forward to what's going to happen from hereon out! Since Hiiro's the kind of kid who's super super genuine and just says what he thinks, he can get pretty far ahead of himself (lol), but I think that honesty of Hiiro's is definitely his charm point!! Please look after Hiiro in the future as well!"