It's NOT a persocom. It's a gynoid (female android). The ears are more decorational than functional, as well as have its UPC and serial codes, and have microphones that function as recorders, a phone, and are used for audio recognition software. Any connections for computers are located in a panel on their back. The Lilith Class is a highly realistic class where the bodies have a synthetic outer casing that is exactly like skin, and human features almost indestinguishable from humans. Lilith's also have a more diverse emotional system and a better AI than previous models and learning software, so they're always updating their own database based on the world around them and their experiances.

The 4N is her model number (4N's are customized gynoids by a company which specializes in "sex-bots" and have special fetish mod's to cater to the customers desires). The G3L is her custom package designation.

This may turn into a story at some point. I kinda like her.