| Soujirou Marui|
|Relatives:||Mitsuba Marui, Futaba Marui, Hitoha Marui (daughters) Unknown wife|
|First Appearance(Manga):||Chapter 11|
|First Appearance(Anime)||Episode 3|
Soujirou Marui (丸井 草次郎 Marui Sōjirō) is the father of the triplets.
"What's wrong with me...? My little girls from that day are still here, right in front of me. Nothing's changed. They're just a little bigger, a little stronger... a little kinder." Soujirou in Episode 8 of the second season
Soujirou is very large and imposing. He is also quite hairy, with a beard, sideburns, and a lot of body hair in general. His fatness and hairiness are things Mitsuba particularly dislikes about him. Generally, people who don't know him think that he looks very suspicious and he is often mistaken as a pedophile or a thief, resulting in him being arrested as a running gag. In his younger years, he actually appeared to be pretty handsome (when he was a kid he resembled Satou), but he has changed a lot over the years.
Personality and InterestsEdit
Soujirou is a loving father to his three daughters, despite the three of them having different opinions of him. If he thinks anyone is messing with his daughters he gets very serious and scary, which is often an overreaction. He can be very overprotective with his daughters and loses his cool if there's even the slightest hint that a boy is getting close to one of them (though he ends up making an exception in the case of Satou and Futaba).
Of the triplets, Futaba adores her father the most. She often takes baths with him and sometimes she even sleeps with him. Although she finds him scary in appearance, she loves him despite all his faults. Futaba even says that she loves him more than anyone else. Soujirou seems to favor her the most out of his daughters and he becomes extremely upset when he thinks she doesn't like him anymore; he became depressed after Futaba accidentally read Mitsuba's essay (while in Futaba's essay, she wrote openly about her devotion to her father, Mitsuba wrote about how disgusting he is). He also tends to get lonely when she's not around.
Mitsuba and Hitoha MaruiEdit
Mitsuba is very ashamed of him due to him getting arrested all the time and his suspicious appearance. She accused him of stealing her panties and let the police arrest him just to save face in front of the class. Hitoha simply ignores him and doesn't seem to care much about him. During a sports event, Soujirou had to pair up with Hitoha for a three-legged race; Hitoha was embarrassed at first, but she ended up running with him and finally winning the race. By the end his shirt was half-ripped and his pants fell down, and Hitoha went from trying to protect her father from suspicious looks to changing her mind and reacting like a pedophile was standing next to her, much to Soujirou's horror.
Despite that, Mitsuba and Hitoha do really care about him, they just don't like to show it. It is revealed that the triplets showed their love for him equally when they were little.
"Satou-kun is the only one I'd trust with my Futaba" Soujirou in Episode 6 of the second seasonSoujirou has known Satou since he was a child, because he is Futaba's friend. At Valentines Day, he helps Satou evade the Hopeless Squad, saying that he used to be popular with girls at his age, so he understands him. Believing that Futaba wanted to give a Valentine chocolate to Satou, he gets angry at first, but he calms down, commenting that Satou is a good boy. At a parent-teacher meeting, he commented that Satou is the only boy to whom he'd trust Futaba, much to Satou's shock.
Soujirou's relationship with the triplets' teacher is not a good one. Yabe constantly gets the wrong idea from the triplets' father (who believes he is making advances on Hitoha) and he is usually beaten by him. This changes in Chapter 168, in which Yabe sneaks to the triplets house to return Hitoha's scarf, but Soujirou finds him and forces him to take a bath with him. When they were starting to get along, Soujirou found that Hitoha's underwear (that somehow got stuck on the scarf) was with the scarf Yabe was trying to return and beat him again. Futaba convinced Soujirou to resolve his differences with Yabe and they were forced to take another bath together.
- According to the manga, he was originally bald, but he looked too scary.
- In a readers poll celebrating 300 issues of Mitsudomoe, he came in joint 23rd place.