Rowan Artifex

Rowan is a main supporting character in Yandere High School, playing the gym teacher at the school.

Appearance
Rowan has a muscular frame and is said to be quite big and tall. He has brown hair with shaved sides that is covered by a dark green hat. He has a brown "horseshoe" mustache and a large pair of white sunglasses. He wears a black, V-neck tank top and with a black belt with a silver buckle. He has camo pants that he wears under a pair of black boots.

Personality
Rowan, at first glance, appears to be an abusive, loud teacher that doesn't care about anyone. This is proven to be wrong as the series continues, and the audience is introduced to a softer and sweeter side of Rowan, albeit still loud and aggressive. He is extremely devoted to his wife and kids, as he once dressed up as a dog for Silly's pet school day. He is someone with a lot of confidence, willing to dress up in silly outfits for his loved ones. He has spoken about how he is willing to hurt, and possibly kill, anyone who talks ill about those he loves. He is shown to be rational and selfless, covering for Sam and Taurtis when they are hiding from the Yakuza, he also is the main person who helps Grian after Sam goes insane and ensures his safety. He is a part of the SWAT along with Okami and Silly.

He sacrifices his life in the season finale, trying to help and protect Sam, Grian, and Taurtis, but is ultimately overpowered by Yuki.

Okami
Rowan is Okami's husband and both of them are deeply in love. Okami also seems to be the one to wear the pants in the relationship, according to Rowan's comments where he says that " is in charge, except when wife is around". They are both extremely affectionate towards one another, with Okami calling Rowan "honey" often. At the start of Yandere High School, it is implied that Okami and Rowan met through their work, as Okami calls Rowan "Gym Teacher" rather than Honey or even his name. They also supposedly meet for the first time in an episode, as Rowan comments that he likes Okami's glasses, to which Okami responds that she likes his mustache, the first instance where Sam and Taurtis question the relationship of the two teachers. Contradicting this, in Yandere, Rowan and Okami are shown to be married before the events of Yandere High School, and they already had Silly Jilly. In Tokyo Soul Rowan returns as a terminator, and Okami is clearly distraught, where she begs him and claims that this is not him, while she has to shoot at him to stop him in his tracks. In these instances, the audience truly sees the deep affection that Okami had for Rowan, with her correcting his actions with a smile and staying by his side. When Rowan dies in Yandere High School, she is overridden with emotions and seeks revenger against his killer, Yuki, while wearing his sunglasses and hat.

Silly
Silly is Rowan's daughter who he is deeply attached to and will seemingly do anything for her, as he dresses up as a dog for her, and when she goes missing in Yandere, he seems to go insane and sets up canons at Sam's house, who he blames for her disappearance. He has a strong affection for her and tends to favor her in school activities, saying that "Silly wins" for almost every event.

MegaNecra
Necra is Rowan's son and other child, but they don't talk much on screen. It's safe to assume they have a good relationship.

Gareth
Rowan and Gareth seem to have a close friendship, as they are implied to have regular movie nights. Rowan had a clear attachment towards Gareth, as once he found Gareth's corpse, he built him a grave at the back of the school and plants him flowers in his remembrance. Rowan was deeply disturbed when Paul Blart made an insensitive joke about Gareth's death, leaving the theatre shaking his head after seemingly having a fun time before. After Sam and Taurtis learn that the grave is Gareth's, they start to talk ill of him as they haven't had many fond memories with him, to which Rowan hits them both and says "I will break your legs", implying the deep bond between the two. It is also likely that Rowan was the only person alive that cared about Gareth, as there is no mention of an other grave, and Rowan built the grave for Gareth.

Yuki
At the start of the series, Rowan and Yuki seem to have a good relationship as he sits with her at lunch sometimes. However as the series progresses, he becomes more uncomfortable around her and knows that she has problems. They don't interact much until the end, where she murders him in the boy's bathroom by drowning him.

Von Heimer
Rowan gets into intense arguments over Von Heimer about the rights of fish people, where according to Rowan he fought in the war to help fish people and Von Heimer fought on the opposing side. Rowan claims that he will beat Von Heimer if he makes anymore racist comments.

Trivia

 * Rowan returns in Tokyo Soul as a terminator
 * Rowan is allergic to dogs
 * Rowan is said to be a Vietnam veteran, implying he is at least 58 years old. Though this could be a continuity error.
 * In Yandere, Rowan says that he fought in a war to end fish people racism, implying that the war he actually fought in was a civil war that took place in the Yandere High School universe.