Avina is a computerised voice in the Mass Effect series, and has been in all of the games so far. It may please some of you to know, then, that she is making a return in Mass Effect: Andromeda, as revealed by the latest Andromeda Initiative trailer.
Avina is the virtual intelligence hologram that can be accessed "throughout the Nexus", which is "designed to serve as your central support hub and temporary home once in Andromeda."
More information on the Andromeda Initiative can be found here, and Mass Effect: Andromeda will be out early next year.