Souichirou is one of Unit 8's Willwearer and a lieutenant. Unlike Takeru, he is serious and describe himself as a "person who separates trash" while Takeru is a "person who does not pick up trash." At the time of the series, he considers leaving Unit 8. He wears Oscar I.

An original anime set in a part of Tokyo that has descended into a quagmire, the story follows Unit 8 of the 5th Special Public Security Section's 3rd Mobile Assault Division — popularly called "The Eighth" — who don powered armor "Willware" exoskeletons to counter the rise in crime. Assistant inspector Asami Kazari is assigned to The Eighth with the task of assessing the unit's status and reporting it to her superiors. But her true goal is to rehabilitate this sloppy, haphazard, justice-less group.
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(Source: Anime News Network)

__Height:__ 177 cm (5'9.75")

On October 26, 2022, it was reported that Sakurai had been engaging in an extramarital affair with a writer of his *P.S. Genki Desu. Takahiro* radio program. A month prior, it was publicly disclosed that he had been married to a former voice actress for nearly 20 years, although the writer had allegedly not been aware of his marriage as they had been in a relationship for 10 years and intending to marry. His previously announced roles as [Haruaki Karuma](https://anilist.co/character/290233) in [AYAKA](https://anilist.co/anime/155982/AYAKA/) and [Kusuriuri](https://anilist.co/character/2865) in [Mononoke (Movie)](https://anilist.co/anime/151117/Mononoke-Movie/) had been recast as a result.

On March 31, 2023, it was jointly announced with his talent agency "Intention" that they are ending their contract, as Sakurai requested to leave as a way of taking sole responsibility of his actions and for self-reflection.

Non-Anime Roles:
-Passenger in "Arknights" (VG/Mobile) (Japanese)
-Su in "Honkai Impact 3rd" (VG) (Japanese)
-Cloud Strife in "FINAL FANTASY 7 REMAKE" (Japanese)

The nation's capital, Tokyo, where the Space Elevator Project is proceeding at full tilt, in preparation for the summit. Established to fight crime based around Willwear, enhanced armor, is the Special Public Security Fifth Division Third Mobile Assault Eighth Unit—Unit 8 in short. Having saved Japan from Logos' terrorism, Unit 8 was now become really popular around the country. However, crimes misusing Willwear showed no signs of slowing down. In fact, they kept escalating. Kuroki and the rest of Unit 8 now have new members on their side, and continue to fight evil crimes with their brains, bravery, and the gift of gab—now with the help of civilian police.
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(Source: Anime News Network)

Souichirou Sena