Kotarou Kashima Husbando

Kotaro has short, light-colored hair and a sleepy look on his face. Occasionally, his eyes sparkle whenever he's excited or happy about seeing his brother or something intriguing like hatching chicks. Like the other kids in the daycare, his cheeks appear to blush whenever he's curious or about to burst into tears. Kotaro wears clothes with a small picture of a tiger (relating to his name which means 'tiger') often. At other times, he's also seen wearing a panda hoodie. In the daycare center, Kotaro's often seen reading a book quietly in one corner, or requesting Ryuuichi to read him one of his choice often. Kotaro's quiet and well-behaved, or on some occasions being the only child at the daycare to not cause trouble for the babysitters. He's very attached to his older brother, and sometimes he gets upset when the other kids hold his attention. He appears to be fond of the chairwoman and calls her "Fluffy" ("Shaggy in the anime), referring to her big hair which it makes her resemble a sheep. Kotaro's well-liked by the other kids and he's very considerate of their feelings, on one occasion choosing to stay overnight with Usaida to avoid picking one friend over another. He appears to dislike conflict in general, and he tries to mediate an argument between Kirin and Taka but it doesn't work. Also Kotaro's a strong and determined kid as he's seen by his attempts to make lemon tea for Ryuuichi when he's sick, and climbing a flight of stairs to deliver Ryuuichi's lunchbox he forgot to get. In addition, he appears to be comfortable in the arms of strangers or acquaintances, and he trusts them easily. He doesn't cry easily, only doing so when he perceives Ryuuichi if he leaves him, or having his efforts go to waste. In contrast to his painfully oblivious older brother, Kotaro's very observant for his age. He is able to perceive tiny details, such as ants, that go unnoticed by Ryuuichi or others.