Kovu cares for his brother, but can also feel embarrassed by his actions, as shown when Kion pinned him to the ground and Kovu's voice contained disappointment when he revealed that they were related. Kovu does not approve of his brother's devious nature, and will not allow him to disobey their mother's orders.
Zira does not appear to care for her eldest son quite as much as she does her other children, as is evident by her lack of interest in anything he does. She seems to view him as somewhat of a failure and shows annoyance at some of his antics. She is barely phased when Kion tackles her son, merely wishing to continue her plan.
Although never being told about Nuka, after Jasiri says lions have taken over her watering hole, he goes to resolve the matter only to be ambushed by Nuka, who attacks Jasiri who he attacks back and demands he let him go after Kovu shows up, showing great disgust at Kion for siding with a hyena showing he hates them.
He despises Kion for attacking him, and for not siding with his pride and shows great happiness when he thinks Kion is powerless for not being able to use his roar, running up to avenge himself only to be attacked by him again, showing that no matter what, he will always fight his enemies.
Nuka is cowardly, as seen when he admits he is scared when they were losing the fight and when he refuses to "play nice" with Jasiri and does not want to give back her watering hole showing his evil side which is the complete opposite of Kion.
Nuka has a noticeable hatred for Jasiri, mainly due to her being a hyena. After running her clan out of watering hole, Nuka was quick to pounce on her upon return, before Kion stepped in. He remained disgusted at the idea of a lion working with a hyena, even after Kion suggested that they might be able to return to the Pride Lands.
When his mother took Kion away, Nuka grew restless and was willing to attack Jasiri. When she returned, Nuka feigned friendship with her.
Rafiki wonders where Kion is, Bunga told them he might go to Outlands for help Jasiri to figuring out how to get the lions out the Outlands but Rafiki told them they, not just any lions, they are the Outsiders. He told the story about Outsiders are a group of lions, but led by lioness name Zira and also loyal to Scar. After Simba defeated Scar he became the rightful king, Zira could not let him king cause Scar chose her son Kovu to be king, but she wouldn't listen to reason. Instead, she attacked Simba, of course, he won quickly. After that, he banished Zira and her family into the Outlands forever.