Ruby

Ruby is a member of the Worlds Colliders and is one of the gems that make up the fusion Garnet in the group. She first meets Bowser Jr. when he and Steven saved her in the Boiling Mouth from Skully.

Appearance
Ruby has bright scarlet skin, burgundy irises, and dark burgundy, dark red eyes, and square-shaped hair. She is shorter than Steven and has a thick build. Her gemstone is located in the palm of her left hand. After her regeneration in "Change Your Mind", Ruby continues to wear a maroon tank top, but the top part of her tank top is now brown. Along with that, she wears long, brown pants and her headband is now golden-bronze and shiny.

Personality
A short-tempered warrior Gem that makes half of Garnet's fusion and wields a singular gauntlet. Ruby is also quick to jump into situations without noticing. Ruby mainly embodies Garnet's strength and courage. She is extremely passionate and emotional, known to be very hot-headed and temperamental. She has violent ways of exhibiting her anger.

Abilities
Thermokinesis - Ruby can increase temperature and generate heat. It is shown to be related to Ruby's emotional state.

Pyrokinetic Touch - This ability allows Ruby to set fire to whatever she touches. Ruby proved she can use her pyrokinetic touch at will and while in a neutral state of mind to make a fire.

Fire Dash - Ruby can move at high speed by forming a fireball around herself.

Heat Resistance - Ruby has not demonstrated this ability, but it was confirmed that the only reason Garnet can swim in lava is by Ruby. She shares this power with Bismuth.

Weaponry
Ruby still wields her singular gauntlet since the Gem Rebellion, however, she isn't seen using it as much as she is normally fused as Garnet all the time.