Young defender Donacien joins Tranmere on loan
The 20-year old centre-back signed a two year contract earlier this summer after impressing in the U21s and NextGen teams.
Janoi, from St Lucia, was also named on the bench for our FA Cup tie against Sheffield United and the Barclays Premier League game against Sunderland in the previous campaign.
Tranmere manager Rob Edwards said: "Janoi is a player I've watched a number of times for Villa's U21s.
"He's a good defender who is very athletic and will give us extra strength in depth at the back.
"I'd like to thank Paul Lambert and Villa for allowing Janoi to join us."