Rook Holmes

Rook Holmes is a supporting character in the Infinite Dendrogram anime, a highly skilled Master (player) in the Kingdom of Altar who starts playing around the same time as the protagonist Ray Starling.

In the anime's depiction, Rook has an extremely handsome appearance with notably feminine features, striking silver hair (his avatar's main customization from his real-life look), and a refined, elegant vibe. He's voiced by Makoto Koichi (Japanese) and Ciarán Strange (English), giving him a youthful yet charismatic tone.

Personality-wise, Rook is exceptionally perceptive and analytical — he has a near-supernatural talent for reading people and situations, often using sharp deduction in battles and interactions (fitting his "Holmes" name). He's calm, strategic, and adaptable, quickly building a unique playstyle around charming and taming monsters (including via his Pimp-related job class, which he takes in stride). He forms a fast friendship/rivalry dynamic with Ray after an early encounter, and his Guardian Embryo is Babylon (a succubus-like entity nicknamed Babi).

In the anime (which covers early arcs), Rook stands out for his clever tactics, emotional depth tied to his real-life backstory (son of a detective and thief, motivated by his late parents' connection to the game), and memorable fights showcasing his charm-based abilities and monster allies. He's portrayed as intelligent, composed, and a bit enigmatic.