Keisuki Hiyuri

"' Being a jeweler isn't easy, it took a lot of hard work in order for me to get where I am today, ' -- Keisuki Hiyuri"Keisuki Hiyuri is a character who is featured in 7-Seas of Excitement and is also one of the main protagonists of the series overall. He is known as the Ultimate Jeweler (超高校レベルのジュエリーメーカー, Chō kōkō reberu no juerīmēkā Lit. Super High School Level Jewelry Maker), though he is referred to by Yuri Kagarin as the Ultimate Observer (超高校レベルのオブザーバー, Chō kōkō reberu no obuzābā Lit. Super high school level Observer), while the Otonokoji siblings refer to him as the Ultimate Keyboardist (超高校レベルのキーボード奏者, Chō kōkō reberu no kībōdo sōsha Lit. Super high school level Keyboard Player)

Official description
" A laidback and generally friendly person who simply wishes to get along with his friends and family. He had helped out his parents' jewelry shop in Okinawa from a young age and is good friends with a lot of people in both his neighborhood and the town. All the jewelry he wears are actually the 1st ever jewelry accessories he made when he was 9 years old." --Official description

Apperance
Keisuki is a high-school boy of average height and has slightly pale-colored skin. He has short, periwinkle-colored hair with bangs that cover up his right eye; because of this, he wears a periwinkle and greenish-grey hair clipped that's shown to be in the shape of a butterfly and also has an ahoge (Foolish hair) sticking slightly downwards to the right at the top of his head that moves depending on his emotions, while his rear hair is shown to be flicked to the left direction.

He is shown to have lake-blue eyes, though his bangs cover up his right eye.

Keisuki is shown to wear a periwinkle blazer shirt under a purple uniform (Presumably the one Yurika made for him) with a blue and white bow-tie. He is shown to wear dark-blue jeans that are shown to be rolled up just a little bit below his knees, along with bluish-grey socks, though it's unknown of what leg length the socks are as Keisuki's jeans cover up his socks a bit. On his feet, the jeweler is shown to wear greyish-red tennis shoes.

He also wears fingerless, dark-periwinkle gloves on both his hands and is shown to carry around with him an emerald-green and pinkish-purple backpack that is most likely filled with his jewelry-building tools

For accessories, Keisuki is shown to wear a greyish-pale purple coat that is shown to have thin, dark-blue lines on it. He also wears red and blue-gemmed shoulderlets on both his shoulder, as well as on both his wrists and knees. Keisuki also wears metal-silver earrings shaped like crosses as well as a blue-gem necklace.

Episode-1 op appearance
In the episode-1 opening song, Keisuki takes the role of a jeweler working for a famous jewelry company. The outfit he wears in the opening consists of a plain white T-shirt underneath a pastel blue, sleeveless hoodie. He wears dark-grey jeans that are shown to be rolled up just a little bit above his knees; Keisuki wears white socks that have 2 thin red lines on them, and on his feet, he wears laceless bright-blue shoes.

Personality
Keisuki is generally a laidback, friendly, and overall cheerful person who simply wishes to get along with his friends and family. He takes great pride into his skills as a jeweler and (because of his parents' business) has excellent social skills. He's shown to be good friends with many people in both his neighborhood and the town, however, his 2 best friends are revealed to be the Ultimate Tailor, Yurika Fumimatsu, and the Ultimate Taekwondo Master, Nakano Hoshikawa.

He's shown to have a high-level of intelligence in gemology and can easily see what gem is which, this is best shown when he was telling the Ultimate Therapist, Sora Ichibakei, several facts about certain gems.

Despite his laidback and friendliness, Keisuki is shown to be somewhat oblivious and very naive of certain things; one example of this is when he, Joshua, the Ultimate Bodyguard, Tsukari Yuika, and the Ultimate Journalist, Sakaira Yuika, were at the Sushi Restaurant, having a discussion about The Kidnapping of Japan's Ultimate Students - V2 while the Ultimate Boxer, Hajime Makunouchi, who had entered the restaurant not long after Tsukari and Sakaira had entered, was eavesdropping on them from a table behind them; only when Hajime announced out-loud that he had to leave right away, did the jeweler and his friends all turn in shock.

Despite this, Keisuki is shown to have been proven to have fantastic observation skills; an example of this is when he, Joshua, Tsukari, and Sakaira all turned and looked at Hajime after he had announced in a rather panicked manner that he had to leave right away, the jeweler was quickly able to notice that the boxer was sweating bullets, shaking uncontrollably, and seemed as if he was about to throw up, as well as the rebuttal he made against Sakaira's theory,

“ ''Oh really, eh? Well, allow me to offer this as a rebuttal; the fact that he was sweating bullets and looked as though he was about to have the technicolor yawn says otherwise, Sakaira-chan,'' ”.

Another major example of this is during PT.1 of the 1st chapter of 7-Seas of Excitement; when Nakano punched Hajime square in the jaw and said the words "Super Makunouching Machine" immediately after to Hajime after he took her personal punching bag a little too seriously, Keisuki was able to immediately detect that something bad was about to happen, his theory quickly proving to be true when Hajime had a PTSD attack that quickly turned into a panic attack right in front of them before running off; a much more accurate example of this though is shown when Nakano began pressuring the Ultimate Spaceman, Yuri Kagarin, into trying out her special rope mechanism with her and Keisuki, which required a rope that had a hook on it, Keisuki was able to quickly realize that Yuri had both Acrophobia, which is the fear of heights, as well as Merinthophobia, the fear of ropes.

Overall, it is rather unknown of how far his observation skills actually go, although it's possible that Keisuki's observation skills surpass even Kanade's observation skills. "' A pure friend who anyone would wish to have. Although being somewhat naive and oblivious, he has amazing observation skills and is often the 1st person to detect something is wrong, you know, like a genderbent mother figure; oh! And he can even see other peoples' auras; he even once stated that the aura Sora Ichibakei had was his favorite aura due to how perplexing it was! ' -- Yurika Fumimatsu"Keisuki is described by Yurika to be a genderbent mother figure due to his ability to notice most unobvious things, as well as his laidback and generally cheerful personality; because of this, he is shown to have many best friends.

Sara Hiyuri
Sara Hiyuri is Keisuki's mother. Keisuki states that he has a good relationship with his mother, who was stated to be a retired keyboardist; that reason alone is most likely why Keisuki decided to take after-school keyboard classes during his middle school years, so that he could be just like his mother. Keisuki claims that his mother is an amazing cook and that her meals were always the best.

Daisuke Hiyuri
Daisuke is Keisuki's father and also the owner of Hiyuri's Jewels. It's stated by Keisuki himself that his father was the one who inspired him to become a jeweler, while his mother was his motivation for learning to play the keyboard.

Sora Ichibakei
Keisuki describes Sora to be an "Angel from Heaven" due to her appearance; when they first met in chapter 1 of 7-Seas of Excitement, Keisuki explained some interesting facts about gems and about how he got his talent as the Ultimate Jeweler, something of which Sora found very interesting about him, despite not actually having a general interest in gemology herself, and was very curious of how bubbly Keisuki was. When Sora was explaining to Keisuki about how she received her talent as the Ultimate Therapist, Keisuki paid full attention to her story and stated that she had an amazing talent and that he was kinda jealous of her because of it, despite having quite a bit of knowledge on mental health himself.

Yuri Kagarin
Yuri is one of Keisuki's best friends, and one of the people Yuri refers to as "soul friend".

When Keisuki 1st met Yuri, Yuri was a bit harsh to him, however, after Keisuki had talked to him and calmed Yuri down from his PTSD attack, it was shown that Yuri had complimented Keisuki for his ability of observation, going as far as to mistake him for the Ultimate Observer, which Keisuki corrected him and told him that his real talent was the Ultimate Jeweler. A major example of how much Yuri sees Keisuki as a soul friend is when he ran off after Nakano had sarcastically threatened to strangle him with a rope if he didn't apologize to Keisuki for calling him degenerate, thus resulting in Yuri having horrid PTSD flashbacks about how he was murdered; something that Keisuki was able to quickly notice thanks to his ability to see auras when he enters aura vision mode and also since he remembered seeing a picture of Yuri on the news, thus allowing the jeweler to conclude that Yuri was a victim the Kairyushima Facility had kidnapped, and though Yuri claimed (Twice) that he had already been kidnapped 37 seven times before, Keisuki knew that this time had overwhelmed him to no end.

When Yuri had ran off right after his PTSD attack had flew into overdrive and ended up causing himself to auto-select flight over sight, Keisuki was the only one who followed him, despite being kicked in the shins by the spaceman after he had attempted to help him. In addition, Keisuki had also calmed Yuri down and explained to him that he knew that Yuri has PTSD, acrophobia, and merinthophobia since he had seen the news about him and the other 15 kidnapped victims. This chain of events led Yuri to complimenting Keisuki for his ability to notice the unpredictable earlier than anyone, stating that his unusally fantastic skills in observation made him seem so much more interesting, before thanking him for simply being there for him when he was in distress, going as far as to mistake the jeweler's talent as the Ultimate Observer, which Keisuki corrected him and told him that his real talent was the Ultimate Jeweler.

Otonokoji Siblings
Although Keisuki is shown to care about the Otonokoji siblings equally, his relationships with both of them share many differences

Hibiki Otonokoji
Hibiki sees Keisuki as a genderbent version of Setsuka Chiebukuro and sometimes jokes that Keisuki is Setsuka's long lost younger brother (Which even Setsuka finds to be a very annoying joke)

Keisuki shares a strong friendship with Hibiki, as she often refers to him as Kei-Kei. The thing Hibiki loves most about the jeweler is that he's good at playing the keyboard