Is Shisui in the Anbu?

Shisui Uchiha (うちはシスイ, Uchiha Shisui), renowned as "Shisui of the Body Flicker" (瞬身のシスイ, Shunshin no Shisui, English TV: Shisui the Teleporter), was an Anbu from Konohagakure

Konohagakure

Konohagakure (木ノ葉隠れの里, Konohagakure no Sato; literally meaning "Village Hidden by Tree Leaves"), also known as "Village Hidden in the Leaves" or "Hidden Leaf Village" is the hidden village of the Land of Fire.

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's Uchiha clan

Uchiha clan

The Uchiha Clan (うちは一族, Uchiha Ichizoku) is one of the four noble clans of Konohagakure, reputed to be the village's strongest because of their Sharingan and natural battle prowess.

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What age did Shisui become Anbu?

He joined the ANBU at 11 and became the ANBU captain a year later at 12. While it was never officially confirmed if he was promoted to jonin, an ANBU ninja was considered to be above jonin level, meaning he had surpassed the level when he became the Captain at 12 years of age.

What rank was Shisui?

Shisui Uchiha is regarded as the one of the most talented members the Uchiha ever produced. Danzo himself had noted his power, and is able to spar against Itachi. Shisui's abilities easily landed him the rank of Jonin at a young age, and soon became a captain of his own squad.