Yes, she's one of the contestants from The Voice season 2. She made it until the semi finals (top 8). Typically, with every singing competition, RHM has those who make it to the live shows sign a contract with them for a year. Within the contract, those contestants have to sing/tour with them for different concerts (Toubourg, Carabao etc.) but they're not signed to be a recorded singer with them unless they're part of the top 4. RHM earns commission whenever other agencies or companies want to hire contestants for events like weddings and parties because they were recognized through Hangmeas TV and they're not allowed to sign with another production until their contract is over.
What happened with Raingsey was after she left the show, she automatically got a contract with them but they made no effort to promote her in any way. She signed with them believing it would open her doors to more growth and opportunity. What she didn't expect was for them to treat her poorly. She performed on Hangmeas Teen Concert and I think Dontrey Ler Tirk once but otherwise, nothing. And then another contestant who was also eliminated during semi finals, Reth Suzana got signed with RHM so that left Raingsey and everyone else disappointed because they all made it to the top 8 yet Suzana is the only one who gets to sign with RHM. I believe Town and Sunday wanted to get Raingsey into their production but RHM forbid her to do so, basically telling her to shut up, stay still and don't do anything lol.