Who is Alis from Arthurian Romances and what is their importance?

Alis is Alexander's younger brother. His father is the Grecian Emperor. When the Emperor dies, Alis receives a report that his brother has died at sea and assumes the crown. When Alexander returns to Greece, however, Alis refuses to surrender the crown, but he agrees to never marry so that Alexander's son, Cliges, will inherit the crown upon his death. After Alexander dies, Alis' advisors convince him to break his oath and take a wife. Alis shows interest in Fenice, the daughter of the German Emperor, but when he is told that she has already been promised to the Duke of Saxony, he travels to Germany where he makes her his wife. When Fenice later fakes illness and death in order to be with Cliges, Alis is sad, but when he learns of her trickery, he becomes enraged and searches for the couple in vain. In the end, Alis dies of grief because he is unable to avenge himself.