Yellow Diamond

Yellow Diamond is a character from Steven Universe and is a major supporting character in The Knights of the Multiverse, making her first onscreen appearance in Season 2. A member of the Great Diamond Authority that rules over the Gem race, she serves as the main field general of the Gem military.

In Season 3, she and the other Diamonds would collaborate with the Guild of the Multiverse to bring Pink back home and destroy the Crystal Knights for, as they put it, corrupting Pink's mind.

Personality
Yellow serves as the main authoritative force of the Diamond Authority, with a blunt and "down to business" attitude, being very quick to anger (despite her reputation among Gems as being a perfectly logical and rational leader) and is easily annoyed by inconveniences. She has a dangerous and lethal temper, treating an act of disrespect against herself or her fellow diamonds with aggression and violence. She often puts forth her own agenda under the guise of what is best for her people, such as how she sees herself above menial tasks, as seen by how she showed no interest in her and Blue's inspection.

Pink Diamond
Due to Pink's passionate, somewhat childish nature, she and Yellow would often clash, with Pink often butting into her business and interfering with her work, making her very annoyed, even forceful at times. She also had no qualms over pointing out Pink's faults as a Diamond leader. Still, she stills cares for her safety as much as Blue's, and if push comes to shove, she'll stick close to her when both are faced with a strong opponent. Heck, Pink is capable of sometimes making her laugh.