LIKO is more sinister than she appears and is more than just a cute mascot to advertise the show!
She's a freeware program that EVERYONE seems to have, can be used on any computerized system, can be upgraded by an underground program, AND you can't even delete her without taking the time to answer a survey! She even sounds super sad when you shut down your computer! Come on, she's gotta be a pawn of LOGOS- Turns out to be the case by the 11th episode.
A-chan is the Baba Micchii look-alike that was supposed to be at the mixer.
Who else could it be?