Ovan is a central and enigmatic figure in the anime.hack//Roots, where he appears as a powerful and mysterious player in the fictional online game The World R:2. He is an adult with a tanned complexion, short blue hair, and dark eyes, and he dresses mostly in blue tones with leather accents. One of his most distinctive features is his unusual right arm, the secret of which is never fully explained during the series. His real-world identity is Masato Indou, and he is 26 years old. Within the game, his character class is the Steam Gunner, a role suited to ranged combat, and he is regarded as an exceptionally strong player.

In terms of personality, Ovan is quiet, reserved, and difficult to read. He rarely explains himself, yet he carries a natural presence that makes others pay attention when he does speak. He appears to know a great deal about the hidden events unfolding within The World R:2, although his silence leaves the full extent of his knowledge unclear. His calm and mysterious bearing stands in deliberate contrast to Haseo, the young and inexperienced protagonist, and even his character design reflects this opposition: Ovan is a mature, dark-skinned adult while Haseo is a pale, teenage-looking youth.

Ovan is the founder and leader of the Twilight Brigade, a small guild created for the purpose of finding the legendary item known as the Key of the Twilight. His personal reasons for pursuing this goal remain hidden even from his own guild members. He enters the story when he saves Haseo from a group of player-killers shortly after Haseo begins playing the game, and he later invites Haseo to join his guild. Under Ovan's guidance, the Twilight Brigade explores the mysterious Lost Grounds and gathers six special items called Virus Cores, believing they will lead to the Key of the Twilight. This quest, however, turns out to be a trap arranged by the rival guild TaN, which wants to capture Ovan and analyze his character data. Ovan walks into the trap knowingly, and his subsequent disappearance leads to the collapse of the Twilight Brigade, an event that shapes the rest of the story.

Ovan's key relationships are centered on the members of the Twilight Brigade. He shares a particularly close connection with Shino, a cleric who knows him better than most and who takes charge of the guild whenever he is absent. His relationship with Haseo has a mentor-like quality, as he takes the newcomer under his wing and draws him into the guild's mission. Other members, such as Sakisaka and Tabby, remain loyal to him despite knowing very little about his true intentions. The guild TaN, and especially the orchestrator Naobi, serves as his main antagonist, with their pursuit of his data being one of the major conflicts of the series.

In terms of development, Ovan remains deliberately mysterious throughout.hack//Roots. The most important revelation about him is that he allowed himself to be captured by TaN, which suggests his actions were part of a larger and carefully planned purpose rather than a simple failure. The anime itself keeps his past and ultimate goals largely concealed, and his character is explored more fully in the connected.hack//G.U. storyline, where the reasons behind his behavior come into clearer focus.

His notable abilities include his considerable skill as a Steam Gunner, shown when he quickly and effortlessly rescues Haseo from attackers early in the series. He is also an Epitaph User known as the Rebirth, granting him the ability to summon a powerful avatar named Corbenik. His strange right arm is tied to the mysteries surrounding him and remains one of the defining enigmas of his character.