In the TV series The 100, initially only Jaha could see A.L.I.E. and nobody else, and he communicates with her.
Secondly, anybody who takes the key to the city of light (that blue star pill) is also able to see the A.L.I.E. - this is evident when Raven takes the pill. She didn't see A.L.I.E. before taking the pill, but afterwards she saw her and even communicated with her.
Why does Murphy see and communicate with A.L.I.E. (who is a hologram) even though he has not taken the pill, but others can't unless they take the pill?
Picture below shows A.L.I.E. in the presence of the chancellor, who has not spotted her: