At first meet, he seems to be arrogant, impolite and cold towards others. This only covers up his otherwise kind and caring personality. Despite his offbeat and arrogant character, Misono is shown to care for his friends deeply.
Because he was very lonely in his childhood without a single friend, he now cherishes his new friends very much, especially Mahiru Shirota, who was his first true friend. Mahiru understands this, and disregards Misono's aloof nature knowing that he cares for him all the same.
He has a very weak constitution and proves to be extremely sensitive about his height and health. What he hates the most is that it's usually him who is being protected by others. To remedy this, he wants to get stronger so that he is able to protect everyone. He is extremely bullheaded and always wants to get his way - he only accepts the answers he wants to hear.
Misono is a very caring guy and always worried about his friends. He likes to be an adult, but actually acts in many ways like a child - which is also fault of his father who wants to prevent him from become an adult. Mikado always tries to keep Misono safe in his garden; he still sees him as a child. As a result, Misono goes to bed early, (and can't stay awake much longer than 9-10 pm), still believes in Santa Claus, is often treated like a child.
Misono is a spoiled character and is afraid of many things little kids are afraid of like darkness, getting snow into his clothes, or bubbles into his eyes. Because he never had friends in his childhood and was overprotected, he doesn't know most games kids use to play like a snow ball fighting. However, he never admits to ignorance and always pretends that he just wants to confirm that his knowledge of the rules are right.
When he was a child he was a very friendly and happy child according to what Mikuni and Mikado say. He in fact did love his older brother, Mikuni, yet he calls him "idiot" or "bastard" after the incident that forced Mikuni's leave.
(Source: Servamp Wikia)
