|Japanese Name||伊丙 士皇（いへい しお）|
:re - Associated (Formerly)
S3 Squad (Defected)
|Occupation||Ghoul Investigator (Formerly)|
|Relatives||Hairu Ihei (Distant relative) †|
Washuu Clan (Branch Family)
|Ward||1st Ward (Formerly)|
24th Ward (Currently)
|Manga Debut||:re Chapter 85|
Shio Ihei (伊丙 士皇, Ihei Shio) was a former ghoul investigator and alumni of the Sunlit Garden. He served as one of Kishou Arima's personal squad until his defection at Cochlea. He and his squad served as one of Ken Kaneki's bodyguards.
Shio was a young boy with short, white hair. He frequently wore the white trench coat typical of members of his squad.
He had an energetic and playful youth, in spite of his harsh upbringing. Among the three members of his squad, he was by far the most talkative and outgoing.
Third Cochlea Raid Edit
Tasked to protect Cochlea, Shio and the rest of Squad Zero later encountered Ken Kaneki beside Kishou Arima's corpse. After being granted permission to say their goodbyes to their late mentor, Squad Zero gathered around the dead investigator and mourned his death. 
Shio and the rest of Squad 0 followed Kaneki deeper into Cochlea and encountered Eto Yoshimura who was critically injured on the floor. Later, Squad 0 aided Kaneki in intercepting the fight between Kiyoko Aura and Mougan Tanakamaru against Touka Kirishima, Ayato Kirishima, Renji Yomo, Kazuichi Banjou, and the members of Banjou's crew.
Post-Third Cochlea Raid Edit
Clown Siege Edit
During the attack of the CCG at Goats headquaters he was seen along the rest of his squad defending fleeing ghouls from Hajime Haizuki and Koori Ui and several other investigators. After doging one of Hajimes attacks, he was told by Hirako to fight as if his oppenent were a ghoul and stop seeing him as a human. Eventually, he and Rikai were killed by Hajime and their heads were brought by the latter to Kaneki.
Shio, along with the other former members of Arima's personal squad, protected Kaneki and followed his orders.
Shio seems to respect and admire Arima and was willing to fullfill his last wish to protect Kaneki even if this means to betray the CCG.
Powers and Abilities Edit
Half-human Physiology: As a half-human hybrid, Shio possessed enhanced physical abilities that allowed him to be a highly-efficient fighter.
Swordsmanship: Though young, he was already an accomplished quinque-user capable of taking on more experienced opponents. He had exterminated many ghouls early into his career, in spite of only being 14 years old.
- Despite being the youngest, he had the highest extermination rate among the half-human trio.