Avina

Avina is the Citadel VI, first encountered by Commander Shepard near the Embassies on the Presidium. Like all VIs she appears as a hologram: Avina takes the form of an asari. She has several terminals around the Presidium, often near points of interest such as the Mass Relay statue or the Krogan Monument, and can answer any questions Shepard might have, giving guidance and a brief insight into galactic events. However, if Shepard's questions get too politically charged, Avina sadly says she hasn't been programmed with the parameters to answer, maybe picking up on the asari's diplomatic nature.

When Shepard's team use the Conduit to return to the Citadel from Ilos, the nearby Avina terminal gives them a status report on the situation. At this point Avina's holographic generator seems to have been badly damaged, though she can still give Shepard an overview of the situation as well as where Saren is headed.