She added that she was unaware of the comedian's treatment of her son until recently.
Gravolet alleges he was a target of DeGeneres' torment when she worked at his mother's recruitment agency in the late 1970s.
"She would criticise my weight".
"She would criticize my weight", Gravolet, now a 52-year-old father of three and vice president of a New Orleans marketing agency, told DailyMailTV, the United Kingdom paper's American show.
She claims that the service went well, but that she was called in to her managers' office a week later, and told that Ellen had made a complaint about her.
Comedian Chris Farah first made the allegations in a March Twitter thread about awful run-ins with Ellen, and this week, told her story to the U.S. branch of the Daily Mail.
"She would criticise my clothes", he said, adding that DeGeneres is: "The meanest, nastiest, most disgusting person". She was friends with the owner, and in my mind I was like "oh this is going to be a really good thing for me. She said "I guess that would look nice if you could draw".
"As I watched her meteoric rise to fame, people would say how great she was and all I could think (about) was, "She must be an incredible actor because she was one of the most vile people I've ever met in my life". Who takes pleasure in giving a child pain?" he asked again, disappointed.
"I think I probably fired her", Tana said. "It appears to me that she hoards power over those that are lesser than her".
The 62-year-old has been stung by salvos after salvos of claims that are at odds with her kind image.
DeGeneres, who is now part of an investigation into workplace practices following complaints about the toxic environment behind the scenes at The Ellen DeGeneres Show, has also been hit by claims she tried to get a waitress suspended for having chipped nail polish. Chris Farah said she was working at a Los Angeles restaurant in 2014 and served DeGeneres and her wife, Portia De Rossi.
Farah's bosses then revealed that the host had complained that her nail polish was chipped during service, and that they wanted to suspend her for two weeks.
"It chipped the night before and I didn't have time to get a fresh manicure after I closed the restaurant at 11 p.m. and reopened at 8.30 a.m.", she tells MailOnline. "It's a insane thing to do".