Ejaria arrives as Didier Ndong leaves for Watford.
Coleman revealed: "Ndong has gone to Watford. He's made it clear that he wanted to go back to the Premier League, and the deal suited us in the end.
"We'll be bringing one in to replace him – a boy from Liverpool, Ovie Ejaria. He's coming to us until the end of the season, which I'm very excited about.
"There's another one (Leeds goalkeeper Andy Lonergan) that's not quite there yet. There's a little way still to go, and it's not over the line. We've still got one or two things to do there, but that said, hopefully that will go through in the next 24 hours.
"On top of that, we still need another face. With a bit of luck, it'll be a bit of experience, but time will tell. It's been a brutal transfer window for us, but then if we can get two or three faces before the end, it will have been a good one for us."