Gabriel Garcia, often called Gabi, is a central character in the Raimon soccer team. His Japanese name is Ranmaru Kirino. He is a second-year student who plays as a defender, wearing the number three jersey. Gabi is known for his distinct, somewhat androgynous appearance, characterized by his long pink hair styled into twin tails and his turquoise eyes, which often leads to him being mistaken for a girl. Despite this delicate appearance, his behavior and mannerisms are definitively masculine.

In terms of personality, Gabi is portrayed as dignified, courageous, and remarkably level-headed. He possesses a calm and understanding nature, rarely losing his temper even when provoked. His most defining trait is his deep loyalty, serving as the steadfast best friend and childhood companion of the team's captain, Riccardo Di Rigo. Gabi is incredibly caring and protective of Riccardo, demonstrated when he stays by the captain's side at the hospital after a severe injury, showing his role as a pillar of emotional support for the leader. He is also confident and unafraid to speak his mind when defending the team's honor.

Gabi's primary motivation is intrinsically linked to supporting Riccardo and protecting the team. He is deeply invested in the revival of the original Raimon soccer club and the revolution against the oppressive Fifth Sector. While he initially struggles with feelings of inadequacy compared to Riccardo, especially when his friend begins developing special powers and techniques like Mixi Max and Armors, his motivation shifts towards finding his own strength to stand on equal ground. This internal drive pushes him to grow beyond simply being a follower.

Within the story, Gabi acts as the defensive anchor and a key strategist. He is one of the first members to join the revolution and sticks with the team through its most difficult periods, even when many members quit after a harsh loss. In the Chrono Stone arc, he remains a core member of the team, though his inability to initially use a fighting spirit, or Keshin, causes him to be temporarily benched. This forces him to confront his own doubts and work to unlock his hidden potential. He proves his value decisively by awakening his own powerful fighting spirit during a critical match.

His key relationships are central to his character. His bond with Riccardo is the most significant, depicted as a deep mutual trust built over many years. Gabi knows the captain's thoughts and feelings better than anyone, often acting as his confidant. He shares a more complex dynamic with Aitor Cazador. Initially, Aitor seems to be a rival, making snide remarks and trying to sow discord within the team. However, this rivalry evolves into a form of respect, with Aitor even faking an injury to allow Gabi an opportunity to play, showing a complicated friendship built on challenging each other to improve.

Throughout the series, Gabi undergoes clear development. He transitions from being primarily a supportive friend to a powerhouse player in his own right. He overcomes his jealousy of Riccardo's natural talent and his own insecurities about not having special abilities. This development culminates in the awakening of his own fighting spirit, Brunhild, a Valkyrie-like warrior, and his ability to perform a Mixi Max fusion with the historical figure Joan of Arc. This evolution allows him to become a crucial offensive and defensive asset, proving that his elegant playing style is backed by formidable power.

His notable abilities include his signature defensive technique, The Mist, which allows him to confuse and disarm opponents. His most powerful ability is his fighting spirit, Standard-Bearer Valkyrie Brunhild, which grants him immense defensive prowess. In the Chrono Stone timeline, he demonstrates the ability to use Mixi Max, further enhancing his skills and contributing significantly to the team's victories against powerful adversaries like Protocol Omega.