Geraint becomes a very close friend to Hector. Erec is famed for never lying and never failing on any promise he has made.
After the death of his his wife, Prince Geraint spent much time at King Arthur's Court, seeking adventure. It was during this period that he encountered the Sparrow Hawk Knight and came to marry Lady Enid of Cardiff. Sir Geraint restored Sir Yniol all of his possessions and then married his beautiful daughter, Lady Enid. Later Geraint heard Enid bewailing his sloth as a knight; he was stung with shame and mistakenly believed Enid to be unfaithful to him. He took her on a journey through a series of trials until she convinced him of her constancy. They returned and lived in happiness for the remainder of their lives. Geraint is eventually slain by Gawain.
Erec is mentioned in many other romances, and is prominent in the Post-Vulgate Arthurian Cycle in which he has many adventures. He is featured in two poems in Alfred, Lord Tennyson's Idylls of the King.
As a figure of Welsh folklore, some scholars argue that he may have actually existed in the period preceding the possible Historical Arthur.