Background
Jewel is the unicorn who stands closest to King Tirian in The Last Battle. From the beginning he is presented as noble, swift, and fiercely loyal, the sort of companion a king would trust with his life. That loyalty is not blind flattery. Jewel remains devoted because he recognizes what is true and good in Tirian, and he responds to it with wholehearted service.
Personality
He is brave, emotionally direct, and incapable of shrugging off evil as if it were merely inconvenient. When Narnia begins to fall under the shadow of the false Aslan, Jewel reacts with real grief and anger. That intensity suits him. Unicorns in Narnia tend to carry an air of purity and honor, and Jewel embodies both without becoming stiff or abstract.
Role in the Story
Jewel is one of the first characters in the book to understand that something has gone terribly wrong. He is not fooled by the imposture surrounding Puzzle and Shift, and he stays beside Tirian when the king is isolated, bound, mocked, and nearly abandoned. In practical terms, Jewel helps keep resistance alive. In moral terms, he represents the refusal to make peace with lies simply because the lies have become powerful.
As the crisis deepens, Jewel keeps fighting for the real Narnia even when it becomes clear that the old world is passing away. That gives him a special place in the story. He is not only a warrior. He is a witness of faithfulness at the end, one of the beings who hold fast while almost everything familiar is collapsing.
Legacy in Narnia
Jewel gives The Last Battle much of its nobility. He is memorable for his courage, but also for his clarity. In a book full of confusion, propaganda, and compromise, Jewel is refreshingly straight. He loves the true Aslan, honors the true king, and keeps that line clear when others do not.
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