Lightning Boy is a superhero from the XXXI Century.
Born on planet Winath, Garth Ranzz was born with electricity manipulation powers. While looking for his disappeared brother Mekt, Garth ran into two other travellers, and with them he founded the Legion of the Superheroes as Lightning Lad (later Lightning Boy).
Role in Injustice
In Brainiac's ending, Lightning Boy questions her friend Brainiac 5 after his unauthorized time travel, but dismisses all charges as soon as it's clear that the Coluan's loyalty lies within the Legion.
Powers and abilities
Lightning Boy can generate and manipulate electricity, discharging it in powerful blasts and manipulating any electric device. He's also a capable combatant, and he can fly with his Legion Ring.