Jay Rock is an unseen minor character in The Loud House.
Jay works at an unnamed radio station.
He is only heard through Luna's radio in "Undie Pressure". He's giving away tickets for a Mick Swagger concert to the caller with the best British accent. Luna calls to the radio station and speaks in her British accent, losing the bet in the process.
He returns in "Making the Grade", to announce free passes for the Royal Woods Spa to anybody who can name the three classifications of rocks. Eager to win them, Lola quickly dials the number, and tells Lisa to give the answer. However, instead of naming the three classifications of rocks, she instead gives off three types of rock music, which costs them their chance of winning the tickets.
Margie was first heard in "A Novel Idea", where Lana and Lola try to attack her in Lynn Sr.'s office for "Take Your Daughter To Work Day". She hates that event, and has never had an on-screen appearance. After the twins attacked her, according to Lola, she took a leave of absence.
Marty Malach is an unseen incidental minor character in The Loud House.
He's only mentioned in "Out of the Picture", where Liam tells his story. Marty wasn't in any group portraits, and all he has is the itty bitty portrait of him, and no one looked at it. As a result, he's now forgotten, and he lives behind Liam's barn.