Loki is now an Avenger, but he used to be a bad guy and had a partner. Her name was Ash, she could do something no one thought of before. Loki is the God of mischief, she is the god of mystical beings and she has the power is the siren

Loki fell in love with her, but she 'Died' so he lost her. She's not really dead, she faked her death to live a happy moral life. Thor knows shes still alive, he even talks to her sometimes

Thor called Ash to the compound, needing her help with a mission