Janna loved her granddaughter Rani very much. This can be seen in the following things that she did for her:
She gave her advice to let the right animals into the Tree of Life. When the Lion Guard showed up, Rani was at first worried about letting them in, but Janna insisted they be let in. After Janna had completed her journey in the Circle of Life, Rani was heartbroken and missed her grandmother a lot. She wasn't sure, if she should or could be queen, and was worried about following in her grandmother’s paw prints.
It was the help of her friends and family that led her to find the self-assurance that she was ready, certain that her grandmother was watching over her, stating Janna had been right that she (Rani) was ready to become queen.
Rani cares a lot for her younger brother. She is very protective of him and doesn't want her brother to get hurt. When Kion used the Roar of the Elders on Baliyo and gave him a concussion, she got mad at Kion for having hurt her younger brother.
Rani loves her mother and father very much. She talks to them in the same way as Kion does to his grandfather, Mufasa. She asks them if she should let the Lion Guard into the Tree of Life. They give her advice and she moves on.
When Rani first met Kion, she thought that he was a threat to the inhabitants of the Tree of Life since Bunga caused a rock slide by accident and Kion used the Roar on her brother Baliyo. Rani pinned down Kion in anger and initially told him that he and the Lion Guard will never be welcome at the Tree of Life. But Rani reluctantly lets the Lion Guard in after being told to do so by her grandmother, Queen Janna, after Rani told her about Kion's roar. Despite letting them into the Tree of Life, Rani thought Kion and the Lion Guard were just going to create more problems for her and the Night Pride. She was quite irate when Kion told her Makucha and his predators must have followed him as it confirmed her worst fears about welcoming the Lion Guard to the Tree of Life. However, she starts to warm up to Kion when he helps her fight off Makucha.
A major turning point in their relationship happened when Queen Janna passed away and Kion comforted Rani, for which she was tearfully grateful. After the funeral, the two of them grew much closer as they opened up about their own personal doubts and worries, while also encouraging one another. Even though the two of them have become close friends and Rani is shown to value Kion's advice, she still thinks that Kion isn't doing a great job as leader of the Lion Guard after they nearly botched the Night Pride's fight with Makucha's army. Rani was proven wrong when she witnessed Kion leading both the Lion Guard and Night Pride in coordinated attacks to fight off Makucha's army in her absence and told Kion that he is a great leader.
Soon after, Rani begins to show signs that she's fallen in love with Kion. During the first fight with Makucha's army, Rani appeared to be gazing in admiration at Kion after he attacked Makucha. After the fight was over, Rani appeared to be troubled when the Lion Guard said they could go home and asked if they had to leave immediately. Rani was relieved and grateful when Kion stated the Lion Guard still had a duty to guard the Tree of Life during the day. After hearing the story of Askari and the roar, Rani wanted to talk to Kion in private, probably to confess her feelings to him and ask him to stay, before Bunga insisted on tagging along. After Kion used the full extent of his new roar abilities on Makucha's army and drove them out of the Tree of Life for good, Rani asked him and the lion guard to stay at the Tree of Life which stunned all of them.
Eventually, Kion and Rani both confess they are in love with each other and she even asks Kion to be her king and mate. Kion and the Lion Guard seriously consider Rani's offer of staying, but they're forced to go back to the Pride Lands to protect them from Zira and her pride of lions. Though visibly disappointed, Rani accepted Kion's decision to leave, understanding that his home was in danger and that the guard had a duty to protect it. Before Kion left, Rani tells him she meant what she told him and later tells Makini that maybe the roar will return to the Tree of Life again someday. Though he returned to the Pride Lands to see to its safety, Kion learned the war with Zira's pride was already over before he arrived. Zira died in the conflict, Zira's pride ended up joining the Pride Landers, and Kovu's sister Vitani created her own Lion Guard in Kion's absence. Later that night, Kion confides in Kiara his feelings for Rani and admits that he misses her with Kiara saying that maybe he could go back to the Tree of Life again someday and claims their parents wouldn't mind. After Kion relinquishes his position as leader of the Lion Guard to Vitani, Askari appears and suggests to Kion that he should go back to the Tree of Life to protect it with the Roar which allows Kion to regain the Mark of the Night Pride given to him by Queen Janna. The former Lion Guard members accept Kion's offer of joining the Night Pride and they return to the Tree of Life. With the Pride Landers and Tree of Life inhabitants in attendance, Kion and Rani become mates, as well as the King and Queen of the Tree of Life.
Rani hates Mama Binturong. At first, she pretended to be an animal in need of help. She only did that so she can spy on the Night Pride and the Lion Guard. Rani soon finds out that she was bad and orders for her to leave the Tree of Life.