Riju

Riju is a playable character in Hyrule Warriors: Age of Calamity. Chieftain of the Gerudo 100 years into the future in Breath of the Wild at her young age, Riju, along with her sand seal Patricia, are summoned to back to the time of the Great Calamity to protect the Gerudo Champion and previous Chieftain Urbosa from Thunderblight Ganon and keep Divine Beast Vah Nabrois in Hyrulean control.

Role In Game
During the Great Calamity, Urbosa finds herself struggling against Thunderblight Ganon inside Vah Nabrois. Despite her best skills and swordplay, the Shard of Calamity Ganon was too fast and agile to be struck, even with her lightning, and she soon found herself in trouble, finally collapsing to one knee in exhaustion as she sees Thunderblight Ganon move in for the kill. However, before she can be slain, Thunderblight Ganon is intercepted and rammed from the flank, knocking it off-course, by Riju and Patricia as they emerge from a time portal to save Urbosa. Treating Urbosa with the utmost respect with calling her "Lady Urbosa", Riju suggests they focus on the battle at hand dealing with Thunderblight Ganon.

However, even with Riju and Patricia helping her, Urbosa finds Thunderblight Ganon is still too fast and agile for them. Riju feels she let the older Gerudo Chieftain down with wanting to protect her, but when Urbosa notices that Link has arrived, she comforts Riju and assures her she bought them enough time, pointing out Link's arrival to the younger Gerudo Chieftain. Now aided by Link, the two Gerudo Chieftains are able to take down Thunderblight Ganon, keeping Vah Nabrois under Urbosa's command. Riju then clears the way to reach Vah Medoh before using Vah Nabrois to provide a way for Link to reach Vah Medoh to assist Revali and Teba against Windblight Ganon. Though Windblight Ganon escapes for the moment, Revali and Teba are safe, as is Vah Medoh.

Urbosa thanks Zelda for coming to her aid, then commends Riju for her help as well, though the younger Chieftain assures the older one that it was a group effort and not just her own, Urbosa is still grateful before asking Zelda about what happened at Hyrule Castle.

Riju continues to aid Urbosa and the others during the defenses of Akkala Citadel and Fort Hateno. At one point, seeing the vast army of Ganon's monsters and corrupted Guardians, Riju begins to doubt they can handle them all, but a pep talk from Urbosa convinces her they can, before leaping down to take Vah Nabrois into action. After they clear the first wave, many of the slain monsters revive as skeletal versions of themselves, with a second wave coming behind them or from the flank. Despite Urbosa's annoyance at the enemy's stubbornness, Riju offers her some sagely advice, impressing Urbosa at how she sees the younger Gerudo vai after her own heart, before they see reinforcements arrive in the form of the other Divine Beasts, giving Urbosa and Riju a good laugh at what took them so long to show up.

After Purah summons them to the front lines with the other Divine Beasts and Champions to join the united allied coalition of Hyrule's races to take back Hyrule Castle from Calamity Ganon, Riju is amazed at seeing so many troops, including their own Gerudo warrior women. Once Zelda launches the siege, Riju aids in clearing the way to the castle, only to find their way blocked by Astor and Harbinger Ganon. After defeating both them and revived Blight Ganons, Astor loses it and orders Calamity Ganon to absorb the heroes, but is instead absorbed himself, being used by Calamity Ganon to create a perfected body for itself. Soon enough, Link is forced to fight Terrako when Calamity Ganon corrupts it with its Malice, leaving Terrako critically damaged, but free of the Malice. Terrako's fate infuriates Zelda, who swears that Calamity Ganon will be defeated once and for all.

Chasing Calamity Ganon to the castle citadel, the heroes find they can't damage Calamity Ganon due to his invulnerable defenses. At least until Terrako, with its last bits of energy and strength, throws itself at Calamity Ganon and self-destructs, breaking Ganon's defenses and leaving him vulnerable. Once Calamity Ganon is weakened by the others, Link delivers the finisher with the Master Sword, cleaving Ganon in half, before Zelda then uses her awoken sealing power to seal Calamity Ganon away for good, freeing Hyrule from his tyranny.

Some time later on the castle balcony, the screw that Zelda had recovered that was all that was left of Terrako begins to react, and as it does, Riju, Teba, Yunobo, and Sidon begin glowing. With Hyrule safe and Ganon gone, their duty was complete and they were being sent back to their own timeline in Breath of the Wild. Riju exchanges parting words with Urbosa, promising to remember their time together and the advice she learned about being a good Gerudo Chieftain from Urbosa, before together with Patricia and the other future Champions, Riju returns to her own timeline.

Quotes
"Lady Urbosa...For now, let us focus on winning this fight."