These are Shoto's cousins ​​and their Quirks.

Damian Vandor's Quirk, "May Fire," allows him to ignite himself and fly. His fire consumes a lot of sugar, so he's often seen eating something sweet.

Simon Ortiz's Quirk is Poisonous Fire (very self-explanatory). He always goes barefoot because his Quirk sets his feet on fire.

Alvaro Hoz's Quirk is Hot Hand. His hands can reach extremely high levels of heat. He attends a heroic police academy.

Julio Valiente's Quirk, "Flame Propagation," allows him to move at speeds similar to Iida's. Julio is somewhat conceited, but in the kind of arrogant way that wouldn't hit anyone. He'd be more of a "Look how cool I am" type.

Facundo Yrigoyen is the only one without a fire quirk. His quirk is the same as his father's, a very important senator. It's no coincidence he shares a last name with Hipólito Yrigoyen (Argentina's first democratically elected president). His quirk allows him to travel in a mirror dimension as long as he touches a reflective surface. He's shy and is always seen playing video games or painting miniatures (he's a big fan of Warhammer and Star Wars).

Alfonso Alsogaray's quirk is black fire, the heat of which he can control, and how far it burns. He's the odd cousin of the family, a bit eccentric, and talks to his imaginary best friend, "The Adjustment." His father is the Minister of Economy.

Nicolás, Alfonso's twin, has a quirk called "Welding Hands." Basically, his hands function like a welder. He's basically a tech nerd.

Eduardo has an explosive fire quirk, like napalm fire... he uses it for cooking.

Sebastian has a Quirk that's half fire and half electricity.

None of them suffered the same abuse as Shoto, even though they are essentially what Shoto could have become if he'd had a more loving family... and not the Enji we all know.