Roberto is a
member of Gorin High's soccer team. He is a quarter-Brazilian but his
nationality is Japanese. Most of the time, he's a quiet loner, but he'll never
abandon someone who needs his help. Although he's a cool and calm guy outside
the soccer field, he
turns hot-blooded when playing soccer.
In Rival Schools, Roberto learned that the highest-ranking member of
every sports team in Gorin High was attacked. Two fellow Gorin students from
different teams (Shoma
and Natsu) started conducting an
investigation, so he joined them to get to the bottom of it. Throughout their
investigation, Roberto serves as sort of a mediator between Natsu and Shoma
during their typical arguments. Towards the end of their mission, Roberto ends
up breaking his arm and worries that he won't be able to play his favorite
position in soccer, as goalkeeper. A scout, however, offers him a chance to
play as a forward.
In Project Justice, Roberto is once again caught in the middle of Natsu
and Shoma's argument. This time, the argument is about whether or not they
should investigate who attacked Momo.
Shoma eventually decides to go with Momo and separates from the team, however,
he is unaware that he was being used to create further chaos that Kurow
started. Roberto and Natsu meet up with Nagare
to continue on with the investigation. After Hyo
was defeated, Roberto and Nagare comment on the newly-formed love triangle
between Natsu, Shoma, and Momo.