Shuichi Kagaya

Shuichi Kagaya (加賀谷修一, Kagaya Shūichi) is a young man who can transform into a live dog mascot costume. After meeting Claire Aoki, he started helping her find her sister and to discover what was his origin.

Appearance
Shuichi is a young boy with short black-brown hair and sometimes wears glasses.

While in his monster form, he transforms into a dog mascot costume with light brown hair color and top right face being darker brown. He has a gun and zip on his back, which can be opened and a person can enter and take control of him.

Personality
At the beginning of the story Shuichi is kind and timid both in and outside school. He is also really self-conscious about his ability to shift and is also terrified of it. As the story progresses he becomes much more cold, serious ,and out-going, accepting his ability and trying to comprehend and improve it.

Plot
Shuichi was speaking with the principal, turning down the principal recommendation. He was living a normal school life. Later Mifune came to him to tell him that she was chosen to receive the principal recommendation. She realized Shuichi had turned the offer, but he told Mifune that she earned it herself. Later while playing on his phone, due to his great smell, he smelled a fire and went to see. As he smelled a girl inside, he thought it won't have enough time to call for help, so he transformed into a dog mascot. He entered the building and broke the wall to save the girl and left her on the ground.

On the next day, he realized he lost his phone and arriving at school he smelled the girl he saved, who was holding his phone. She saw him transforming into a monster and wanted to speak with him. At the school roof, he tried to deny he was a monster, but the girl, Claire, pushed him down from the roof. While falling he transformed and then jumped back on the roof. She then started questioning him about what he was threatening she will reveal his secret. But Shuichi had no idea, and told her, he just transformed one day. On the way to her home, she introduced herself and showed him a coin she found, but Shuichi didn't know anything about it. In her apartment, she explained she was looking for her sister, who was a monster like him.

Power & Abilities
When transformed he gains peak human physical abilities: Greater strength, greater agility, greater endurance, a very good sense of smell (even stronger than a dog's). Also, some of his power works as well in his human form but the quality of the abilities is weaker. Shuichi might gain some sort of immortality when transformed as when his head was ripped of his 'neck' he was still alive while transformed but as the alien told him that it was a good choice not to transform back to his human appearance as he would have died on the spot.

From what is known for the moment his abilities are to sustain a "host" when transformed, furthermore increasing his abilities further but, the one that is inside can also control him to some extent depending on the person or the "compatibility" of the pair. The more aligned Shuichi and his partner are in their goals, the more powerful the monster form becomes, becoming more resistant to physical attacks (including intense fire breath) and gaining greater speed and reaction times. This "alignment" has the potential to use the other ability described below, in which the pair becomes a single, more powerful being. The host is also protected to some extent from attacks but when the attack is to strong then the host might suffer some damage, also Shuichi still feles pain in this form, it might be reduce to some extend ( seems that inside of the suit is very hot and has some slimy property in it ).

When he transforms he appears to gain some sort of gun, a revolver that seems to appear only when he is transformed and disappears when he goes back to his human form. The revolver might hold about 6 bullets in total, without more spare bullets and having a strength similar or even greater to that of an anti material rifle, being able to incapacitate an angered Elena with two shots (one in the leg and one near the shoulder). It's assumed that the weapon could theoretically be used by anyone; though the weapon would be extremely unwieldy due to its size (as it is scaled to Shuichi's monster form), and the implied recoil would probably destroy the spine of a normal human if they attempted to use it.

Another ability that Shuichi owns that is discovered sometime later, only works if it meets some requirements. The requirements might be related to the compatibility between the pair and/or near state of death of both of them when they are together. This ability lets both of them become "one", as it says they literally become a single being that is much stronger and also looks different retaining similarities to both of them, first the appearance of the body of the host and second a beast-like appearance of the original body. The combination of both might have some secondary effects on 'their sanity' and might act like a wild beast in search of blood and carnage and such state only lasts as long both consciousnesses have the same goal. As both become 'one' they end up sharing their memories, or at least the one that was inside Shuichi gains his memory's as he seems not being able to remember what happens. The previously mentioned gun, changes as well, from being a revolver it changed to 2 smaller pistols from what could be seen on the first use of the said state. Yoshioka describes this ability as being incredible and unique, and was the only way to defeat Honoka.