Unlike Janja's clan and Scar, Jasiri is friendly and open to making friends with the Pridelanders. However, her tie to her species shines through in how often she laughs, Kion noting that the world is like a giant game to her. Bold, spunky, and snarky, Jasiri is a hyena through-and-through, but unlike Janja, she is a friend to the Pridelanders.
Jasiri differs from her kind by looking past differences and focusing on where different species have common ground and noting how what they have in common makes them the same in a way that not only advocates peace and harmony but also how some very different species can be friends despite their differences. According to her, unlike Janja and his clan, most hyenas, especially her, respect the Circle of Life and is actually disgusted by hyenas like Janja whose selfishness and gluttony give their species a bad reputation.
Being only a cub, Jasiri is small in size, with a thin frame and skinny legs. Her pelt is gray with dark spots and stripes running along her back and shoulders, and her eyes are purple. A long black-and-purple mane runs up her back, ending in bangs over her forehead.
- Animal Strength: Jasiri is a very strong hyena; she is shown to have very strong kicks and can easily pin down opponents, though she did have trouble escaping Janja's strong grasp when he pinned her to the ground.
- Skilled Combatant: Jasiri is a very capable fighter; she is very resourceful when fighting to kicking up dust to block her opponent's vision.
- Intelligence: Jasiri is very intelligent and witty. She easily tricked Kion into falling into a thorn bush and is generally very clever.
In "Never Judge a Hyena by its Spots". When Kion gets separated from the rest of the Lion Guard, he ends up in the Outlands. As he desperately seeks Flat Ridge Rock, he is confronted by Jasiri, who teases him for not having noticed her sneak up on him. Kion bristles at this and claims to have known she was there the whole time, but Jasiri continues to poke fun at him.
She catches his attention when she calls him out for being the leader of the Lion Guard, and she points out that his shoulder mark is a dead giveaway. Kion questions if she's a part of Janja's Clan, but Jasiri answers ambiguously, asking Kion why he's in the Outlands. Though defensive, Kion tells her that he's hoping to get back to the Pride Lands, and Jasiri points out that he's going the wrong way and says she will show him the way. Kion follows Jasiri but is distrustful of her.
Kion remains distrustful of Jasiri and gets himself caught in a thorn bush. Jasiri gets him out of the bush and then leads the way to Flat Ridge Rock. After a while, Jasiri reveals that most hyenas actually respect the Circle of Life and voices how similar hyenas and lions are before she and Kion sing "We're the Same (Sisi Ni Sawa)". When they get to Janja's territory, they part ways. After Kion leaves, Jasiri is confronted by Janja and his clan. She is able to easily defeat Cheezi and Chungu, before being pinned down by Janja. Kion comes back to help Jasiri and drives the Outlander hyenas off using the Roar of the Elders. The Lion Guard arrive and at first think Jasiri is a threat, but Kion assures them that she is a friend. Jasiri parts on good terms with the Lion Guard who return to the Pride Lands.
In "Lions of the Outlands" Jasiri enters the Pride Lands in search of Kion after a pride of lions take over her family's watering hole, refusing to share it. Kion goes with her, believing that the lions in the Outlands must be lost and don't know about nice hyenas, completely unaware of the history or existence of the Outsiders. Jasiri expresses her gratitude that Kion agreed to help knowing how difficult it can be to trust her kind. Jasiri introduces Kion to her clan, that consists of two adults, her sister, Madoa, and two babies. Madoa expresses her surprise that her sister was telling the truth about being friends with a lion and that he is willing to help them as she and Jasiri point out the babies need the water the most.
Jasiri is ambushed by Nuka, only for Kion to save her. She is ready to fight by his side only to back down when Nuka and Kovu agree to take them to see their mother, Zira, in hopes to get her watering hole back. A short time later, she is shocked by Kion's ability to use the Roar to create rain. When Zira wants to talk to Kion alone, she warns him that she doesn't trust her and he should be careful. She is left with Zira's children including Vitani and is happy to take advantage of Nuka, who is told to "play nice."
When Zira lies to Jasiri about Kion claiming the watering hole for her pride, Jasiri runs off angrily. She encounters the Lion Guard who inform her about Zira's true motives and reassuring Jasiri's beliefs that Kion would never turn his back on a friend. She joins the Guard in rescuing Kion and watches with delight as the Outsiders are thrown out of the Outlands by the Roar, reclaiming her family's watering hole. She compliments Kion on being the fiercest animal when the baby hyenas still cower away from him, causing everyone to laugh.
Jasiri is seen in this episode "Rescue in the Outlands" discovering Janja, Cheezi and Chungu in her territory, after Janja failed to mark it for the Dry Season. Janja angrily tries to take the territory back, but Jasiri defeats all three easily. Later, Janja receives orders from Scar to eliminate Jasiri. At the time, Jasiri is playing with Tunu, Wema, and Madoa. Jasiri finds Tunu and Wema, but they are attacked by Janja. Jasiri saves Tunu and Wema from Cheezi and Chungu, but Janja knocks all three of them into a steam vent. Jasiri is then saved by the Lion Guard, and Jasiri takes Tunu and Wema home.
In "The Hyena Resistance", Jasiri is approaches the Lion Guard after watching them defeated the Outlanders and is informed of Scar's return. Kion offers Jasiri and her clan a place in the Pride Lands to stay, but Jasiri kindly rejects because the Outlands is her clan's home. She instead proposes the idea of forming the Hyena Resistance to oppose Scar to her clan. After the resistance is officially formed, Jasiri and her clan acts as spies for the Lion Guard, informing them the location that will become Scar's army's target while also thwarting each group in charge of the plan before they can leave the Outlands while the mission is carried out.
However, after their third success, the skinks finds out about the Hyena Resistance and inform Scar who directs their next attack to Jasiri's clan by having Janja spreading false plan that they will attack Mizimu Grove while in reality the entire arm will ambush her clan. Hearing the false plan, Jasiri sends Madoa to inform the Lion Guard. However, once Madoa returned after delivering the news, they are surrounded by Janja's clan, Kiburi's float, and Reirei's pack. Fortunately, the Lion Guard finds out about the ambush and helps the resistance in fending off the Outlanders. When Jasiri is ready to face Janja, one of the crocodiles is tackled by Fuli, hitting Janja and causes him to fall into the lava pit. Jasiri quickly saves Janja, much to the latter's shock. Jasiri tells Janja that they're the same and invites him to join the hyena resistance. Janja hesitates for a moment before refusing and leaves.
Because Scar now knows about the hyena resistance, Kion becomes worried that Jasiri and her clan won't be safe staying in the Outlands, but Jasiri still determines to defend their home and assures Kion that even if Scar knows about them, he can't do anything if they can't find them.
- Jasiri is similar to Asante, a female hyena cub from The Lion King German audiobook Friends for Life who befriends Simba's son, and Kion's noncanonical older brother, Kopa.
- Jasiri translates to daring.
- Due to their interactions, it can be safely assumed that Jasiri and Janja have encountered each other before. This statement was proven true in the episode "Rescue in the Outlands".
- The reason Jasiri was made into a protagonist was due to the perceived racism the heroes held against the hyenas in the original film.
- Despite only being a cub, Jasiri has shown to be able to overcome most of Janja's pack in a fight, with a little help from Kion and the Lion Guard, presumably based on female hyenas being stronger and fiercer than males, even as young cubs.
- She speaks with a slight, but noticeable Australian accent.
- Jasiri and her clan are the only ones to consider the Outlands as their home, while all the other inhabitants describe this place as hostile and miserable.