Conochbar mac Nessa is a character from Irish mythology, specifically associated with the tales of the Ulster Cycle. He is known as a king of Ulster and is often depicted as a warrior and leader during the time of the legendary hero Cú Chulainn. In the stories, Conochbar is portrayed as a complex figure, balancing his responsibilities as a ruler with the challenges of warfare and personal relationships. His reign is marked by significant events, including battles and political intrigue, which highlight the themes of honor and loyalty in Irish folklore.