The little we see of Oakheart prove that in battle he is fierce and relentless, and his quick and witty retorts make their way outside battle. Along with them, he is easy going and laidback, unafraid to state his opinion.
HISTORY
INTO THE WILD Listed as RiverClan deputy: Oakheart
Oakheart appeared in the prologue of this book, were he died. But mystery surrounds his death, and the story in ThunderClan is that he killed Redtail, and Tigerclaw took his life in revenge [ITW0]. Oakheart actually died in a rockfall.
GENERAL
Except for glimpses in StarClan, we see very little of Oakheart, save for his vicious battle with Tigerclaw in the battle of Sunningrocks. What we know from later books is that he had a secret affair with Bluestar when they were younger; a story Vicky promises when be documented in a later book.
His three kits were kept a secret from ThunderClan, and Bluestar took them to RiverClan to be raised by Graypool, and old RiverClan queen whom Oakheart knew well. Mosskit died on the way to RiverClan, but Stonekit and Mistykit lived on and became warriors.