Logos is a tall slim man who wears a black and silver helmet with a chin protector tied round the back of his head with a purple strip, and a blue robe and matching coat that features the Leblanc Syndicate logo on the shoulders and the sweeping, kimono-like sleeves. He has a purple sash around his waist and wears wraps around his ankles.
Like the rest of the syndicate, Logos is loyal to Leblanc and exceedingly cocky and intelligent. He is the brains of the Leblanc Syndicate, and tries to keep Ormi under control when the latter gets agitated. Logos has a thing for recording naughty sphere videos, and a sphere he recorded during his visit to the Bevelle Underground seems to focus on Yuna's backside.
Logos and Ormi originally worked under Maester Wen Kinoc and were responsible for documenting the results of the Crimson Squad's test in the Den of Woe. Later leaving the Yevon order alongside Ormi, Logos was taken in by Leblanc and became one of the key members of the Leblanc Syndicate.
When Leblanc poses as Yuna and organizes a concert in Luca, Rikku and Paine disrupt the show to retrieve their stolen Garment Grid. When Logos and Ormi cut Rikku and Paine's escape route, Yuna joins in the battle. Logos and Ormi flee alongside Leblanc and leave the Garment Grid behind.
Near Mt. Gagazet's peak, Logos, Ormi and Leblanc compete against the rival sphere hunting group, the Gullwings (of which Yuna, Rikku and Paine are members of), to snatch the sphere hidden in the Floating Ruins. On the way to the top, Logos and Ormi send goons to halt the Gullwings' progress, but the Leblanc Syndicate is beaten to the sphere.
Logos and Ormi join in the fiend hunt in the Mushroom Rock Road to get to the entrance of the Den of Woe, a mysterious sealed cavern. They find the Gullwings spying on them and flee, but drop one of the Crimson Spheres needed to open the den's gate.
When they are absent, Leblanc Syndicate breaks into the Gullwings' airship, the Celsius, to steal a broken sphere the Gullwings had found in the Zanarkand Ruins, as they already have the other half. The Gullwings plan to reclaim their stolen sphere half by disguising in Leblanc Syndicate uniforms. During a mission to acquire said uniforms, Logos, Ormi, and a Fem-Goon attack the Gullwings on the Djose Highroad. They lose, allowing the girls to acquire a uniform. Logos runs into the Gullwings at Bikanel and fights them without Ormi, and is defeated, allowing the girls to acquire a second uniform.
When the Gullwings sneak into Chateau Leblanc, Logos and Ormi order the disguised Gullwings to massage Leblanc. Afterward they order the Gullwings to check on the switch that leads to an underground maze. When the Gullwings find a dud sphere in Logos' room, Logos and Ormi battle them but are defeated. They lose and flee to warn Leblanc. The Gullwings find their half of the sphere, and learn that the Syndicate already has the other half. Logos, Ormi, and Leblanc battle them one last time, but are again defeated. After the Gullwings view the now restored sphere, and realize how dangerous Vegnagun is, the sphere hunters put their differences aside and decide to investigate Bevelle Underground together to learn more about the ancient machina weapon. Logos records their findings: a large hole in Vegnagun's lair, the weapon having fled to the Farplane. When they later view Logos's sphere they spot Nooj in the background.
After Baralai becomes possessed by Shuyin and leaves for the Farplane to activate Vegnagun, Nooj and Gippal follow. After the Gullwings quell the rising tension between Youth League and New Yevon by organizing a concert, they decide to follow, and are joined by Leblanc, Ormi and Logos. The sphere hunters make their way to the heart of the Farplane where Leblanc, Ormi and Logos help the Gullwings and Nooj and Gippal in dismantling Vegnagun.
Logos is fought numerous times, usually alongside Ormi or Leblanc. His signature move is "Russian Roulette". The rings that show during the animation for Russian Roulette have the words "Russian Roulette" inscribed on them in Spiran script.
Logos can be recruited through the Creature Creator system.
Logos appears in Final Fantasy Trading Card Game as Earth-elemental Forward cards.
Behind the scenes
His Japanese name is Sanō.Sanō (左脳) means "left brain" in Japanese.
His English version name was changed to "Logos."Logos is Greek and means, among other things, "thought," "logic," or "speech," all of which are controlled by the left side of the human brain.