Ichimatsu

Ichimatsu is the "lone wolf" of the Matsuno brothers. He has an affinity to cats and chooses to spend time with them instead of people. Because of this, his brothers see him as incapable of friendship, despite the truth that Ichimatsu is just not self-confident to befriend others. However, it very so happens that Ichimatsu actually has a difficult time expressing himself.

In a gag in "Super Detergent", his heart is depicted to be made of glass with a "fragile" sticker on it. This infers that Ichimatsu is very sensitive and only acts dark and cold for his protection, which is so much as suggested earlier on by Todomatsu in "Accident" when he refers to Ichimatsu's true normal feelings being exposed by ESP Kitty

Ichimatsu still shares a similar appearance to his brothers, but he can be differentiated from them by his half droopy eyes, slightly ruffled hair, hunched back, and the usual two cowlicks, He more often dressed primarily in purple hoodie, alongside simple blue sweatpants (with a white running stripe) and purple sandals for casual/home wear. Purple is also seen in other casual clothing, along with a looser fit, Ichimatsu becomes more distinct as an adult: though the brothers all sport identical outfits that match their Ichimatsu has a rather stock personality, interchangable with that of his brothers at any given time. While occasionally given traits, they aren't overly consistent to him in particular, and often in appearances individual brothers aren't even named, making it hard to single him out from his siblings. Ichimatsu, like his brothers, is not the most upstanding nor moral person. He often causes petty problems and has few real aspirations, being a shut-in NEET. He also has a very muted exterior, being a quiet, shut-in person that prefers not to talk to others. He bottles in his emotions and is, as a result, also prone to outbursts when provoked. Karamatsu is the most common recipient of these outbursts, though all the Matsunos and anyone else is also liable to provoke him. Ichimatsu is noted to have a soft spot, and even a preference to cats, whom he flocks towards