Marino You is a character from the anime Star Driver. She is the twin sister of Mizuno You and is affiliated with the Glittering Crux Brigade, operating under the name Manticore. She belongs to the Vanishing Age division, which is led by an individual known as Head. When Head takes a leave from the organization, Marino is promoted to the position of head of the Vanishing Age.

Her primary motivation for joining the Glittering Crux Brigade is to protect her sister Mizuno, who is the West Maiden. Marino is devoted to keeping the identity of the West Maiden a secret. It is suggested that Marino herself is a creation of Mizuno, brought into existence to cope with the loneliness Mizuno felt after being abandoned by their mother. This background shapes her personality, which is generally kind and gentle toward Mizuno but can become forceful or intimidating toward others. She is also noted to be a sports star at school.

In terms of her role in the story, Marino serves as both a member and later a leader within the Vanishing Age, participating in the organization's efforts to gain control of the Cybodies hidden beneath Southern Cross Island. She becomes a Star Driver after being promoted, though her relationship with the other members of the Vanishing Age under her command is strained. She pilots the Cybody known as Ayingott, which had been destroyed in a past battle against the Cybody Samekh. Her appearance includes pink hair and a red Chinese-style dress, and she often wears a mask for much of her time in the organization.

Her key relationships revolve around her sister Mizuno, for whom she bears a deep protective bond, as well as her interactions with Head and the other members of the Glittering Crux Brigade. Her development sees her stepping into a leadership role and gaining the ability to pilot a Cybody, though she remains primarily focused on safeguarding Mizuno's secret. Notable abilities include her skill as a Star Driver, piloting Ayingott in battles within Zero Time.