What relationship did sir ector de morven have with arthur?

Sir Ector de Morven was Arthur's foster father, raising him after Arthur was placed in his care by Merlin. Ector treated Arthur as his own son, not knowing his true royal lineage. Their relationship is characterized by loyalty and affection, with Ector supporting Arthur throughout his upbringing and development into the future king. This bond is central to Arthur's early life and his eventual claim to the throne.