Which taxpayer has a potential qualifying relative that meets the relationship or member of the household test?

Blake lived with Owen as a member of his household for ten months in $2023.$ Blake is not a relative.

Devan is Samara's cousin. She lived with Samara for eight months in $2023.$

Nova's father, Kelvin, lived with her since $2022.$ Kelvin died on March $1,2023.$

Xavier's girlfriend lived with him as a member of his household for seven months in $2023$