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The stars are beautiful today, don't you think? How about stargazing together? I used to like watching them by myself, but now if you're not here, Princess, it's not enough. Do you know what this feeling is?
A member of the two-man unit KitaKore. Tomohisa is a son of a wealthy family. Despite his mature look he is naive when it comes to a commoner's way of life. He is often called the prince of B-PROJECT. And occasionally takes the role as their leader.
With a height of 180 cm, Tomohisa is the third tallest member of the group. He has slightly unruly short white hair and ocean blue eyes with a tint of yellow.
He wears different outfits in the game and anime. His style can be considered well-dressed and light-coloured. Tomohisa often wears the colours white, beige and blue.
Tomohisa is a rich, intelligent young man. Both his attitude and manner are that of a fairy tale prince. He is good in leadership. In contrast, he lacks personal awareness. As he grew up in a wealthy household, he has difficulties to adapt to the simpler life situation. Nevertheless, he is curious to know more about it and tries his best to adapt.
Even though he is good in helping others, he rather stays silent about his own problems. This sometimes causes tension between his childhood friend Ryuji and him.
He also likes to tease Ryuji and their A&R, Tsubasa.
The Kitakado family is active in the medical business. Tomohisa has two older siblings, an older brother and sister. His father runs a hospital. It was hinted that his current family situation is difficult.
Kitakado Tomohisa and Korekuni Ryuji are childhood friends. They first met at a party where they both sneaked out and played in the snow and built snowmen and snow bunnies. Later on, both of them were enrolled in Bambi school, and by luck, they were placed in the same unit.
Both share a close bond and would meet up for meals. Ryuji would choose the place as Tomohisa has many places he wants to go to. There are rare times when they take jobs separately. But if it happens, they are worried and think about the other's wellbeing. Though their concern for the other sometimes becomes a burden to their bond as they tend to hide their problems and deal with them on their own, much to the displeasure of their partner. In his SSR [BIRTHDAY PARTY] and the Season 2, Ep. 4 Tomohisa rather hid his negative feelings from Ryuji which caused a rift between the two. It becomes apparent that Ryuji wants his partner to be more open with him when it is about his worries since he also wants to help him solve those problems.
In the issue of 2D☆STAR vol.3, Ryuji said if he was a girl it would be impossible to mingle with Tomohisa as their values are too different. But he didn't think anyone else would be his partner except for Tomohisa. The latter would choose Ryuji as his boyfriend if he was a woman. This shows that despite their difference in thinking and personalities they think of each other as irreplaceable.
Even though both boys grew up in wealthy families their individual understanding of the common life differs greatly. Ryuji often has to correct or teach Tomohisa simple things. He often is seen to sigh at the naivety of his childhood friend. He has an eye on Tomohisa's spendings since the latter tends to overestimate the cost of ordinary things like a train ticket. Season 2, Ep. 1 clearly states that Tomohisa wouldn't be able to survive without Ryuji because of his ignorance of many things.
Moreover, Tomohisa likes to tease Ryuji about his occasional dishonesty which makes the latter blush in embarrassment. Nevertheless, both feel the most comfortable around each other's presence.
Tomohisa and Kazuna knew each other since their Bambi period and they hosted the Prodigy Brunch Special, a popular lunch show, together during their time there. Their relationship started out well. However, as time passed Kazuna felt inferior to his friend. He tries his best to act independent of Tomohisa but comes to his personal conclusion that he will always be outshined by his teammate. 
In contrast, Tomohisa is not of the same opinion. For him, Kazuna is a very capable person who has his own charm and shine and admires him, never missing any of MooNs' performances. He is not aware of Kazuna's conflicted feelings.
It was after the talk with Ryuji who questions his inferiority complex and noticing an annotated magazine about the food in Hokkaido in Tomohisa's bag that Kazuna had a better understanding of Tomohisa.
As expected of B-PROJECT's prince he treats Tsubasa like a princess. He is very kind and overly generous to her, often wanting to buy her something on the whim. Tsubasa is mostly shown to feel a bit uncomfortable when he goes over the top with his generosity. She then changes the topic to put a stop to this situation.
Surprisingly, Tomohisa becomes selfish and childish in Tsubasa's presence. In many of his card stories he muses on how he'd like to see her in specific clothes such as a kimono in his SSR「New Year」or wants to do something together, adding the sentence "Would you allow me to be selfish?".
As he grew up in an affluent environment, he lacks knowledge about the common life. Tsubasa often times is perplexed anew at the gap between the princely leader and rich child. She then takes over Ryuji's task to teach and explain him the things he does not know yet. His SR「Snow Rabbit」is a good example. Until then snow bunnies were unknown to him. So she showed him how they are made and he was very pleased about it.
However, as lost as he looks when being presented with the common life, he has extensive knowledge about those things he loves and takes big interest in, such as the stars and gems. In private moments he talks about those interests to her and tends to compare her to them. 
He also tends to flirt with her but his flirting differs greatly from Kento's. It has a more playful and tender touch. Same goes for his teasing. Ryuji and Tsubasa are frequent subjects of his kittenish remarks. Sometimes he gives off comments that are meant to be innocent but there are also times where it is not clear if those were unintentional or not, thus confusing Tsubasa.
Besides this, he has shown concern towards her on many occasions. In both season 1 and season 2, as well as in the game he pays close attention to Tsubasa's health condition. He does not want her to overwork herself.