King of Crete who returns from the Trojan War and must choose between his paternal love for his son and a sacred vow to Neptune to sacrifice the first person he meets.
Biological father and son; Idomeneo struggles between paternal love and his sacred vow.
The High Priest holds significant influence over the King and demands vow fulfillment.
Serves as a trusted priestly aide and counselor to the King.
The voice of Neptune acts as the ultimate judge, halting the sacrifice and dictating the resolution.