A magical cat from Bandle City, Yuumi was once the familiar of a Yordle enchantress named Norra. When Norra mysteriously vanished, Yuumi became the Keeper of Norra's sentient Book of Thresholds. Longing for Norra's affection, Yuumi seeks out companions to travel with, protecting them with shields of light and fierce determination. While Book tries to keep her focused, Yuumi is easily distracted by fun things like naps and fish. However, she always eventually returns to her quest to find her master. Her abilities include firing missiles that deal damage and slow the first target hit. She can gain a shield and increase movement and attack speed. She can also channel to fire five waves that damage enemies or heal allies, and she can move while channeling. After being summoned by Ryze, she decided to travel with him. She looks like an ordinary cat but is capable of speech.

She meets Ryze on his journey and joins him since their goals align. Raised in the slums, Vi is a formidable woman who is impulsive, hot-headed, and has little regard for authority figures. Having caused plenty of trouble in her youth and spent significant time in prison, she is highly skilled in the ways of survival. However, she now stands on the side of maintaining order rather than disrupting it. The Hextech Atlas Gauntlets she wears can easily punch through criminals and reinforced walls alike. Her abilities involve charging energy into her gauntlets before dashing forward to deliver a powerful punch, dealing damage and knockback upon impact. Furthermore, her strikes can shatter an enemy's physical defense to deal bonus damage while increasing her own attack speed. She can also unleash a shockwave with her next basic attack and charges a shield at regular intervals.

Jinx is a manic and impulsive criminal from the underground city. Haunted by the consequences of her past, she continues to bring destruction and chaos in her own unique way. Using powerful self-made weapons to cause flashy explosions and rain down bullets, she creates mayhem wherever she goes, inspiring the downtrodden toward resistance and rebellion. With a press of a button, she switches between her weapons: 'Pow-Pow' (a minigun) and 'Fishbones' (a rocket launcher). Sustained fire with the minigun increases her attack speed, while the rocket launcher offers long range and area-of-effect damage at the cost of attack speed. She can fire a laser from a stun gun to damage the first enemy hit and throw three flame chompers in a line. If an enemy touches a chomper, it activates and deals damage; otherwise, they explode automatically after 5 seconds, damaging nearby enemies.