Possiblie spoilers regarding hype and element of surprise values!
Also, there is a full character database you can check out .
Main and Secondary Characters
The lost cyborg kid who stumbles upon the big building when she gets lost in a prairie.
The man who wants something to do with the big building. His plans and reason remain unkown, but we have yet to find that out, of course.
A mysterious medical robot who has some sort of deal with April. Works closely with Wyra.
The first friend that April meets in the building and provides her with all the know-how. A friend of Matro and Ida.
A transporter robot in the building that drives one of the trains, and also a friend of Pillia. Knows most places around the building from top to bottom and also becomes friends with April.
The daughter of Mr Skatra who does most of the action-type work. Seems to keep running into April, somehow.
A suspicious gardening and landscaping robot who's kept disappearing since a few days prior to April's arrival. Caught by April and company and held hostage to give information.
A public utility robot who's also strangely hostile towards April. Works closely with Doc.
A quiet android who voluntarily helps out Doc and Wyra as a scavenger. Also Pillia's friend.
Other Building Inhabitants
The robot who works with fabrics and fibres, who mysteriously disappeared from her place.
The robot in charge of restocking things who has also assumedly disappeared from his place.
A sennajay whose lodgings community was mysteriously taken away from them.
One of the DJs that broadcasts building updates and music. A bit of a scatterbrain.
The other DJ that broadcasts building updates and music. A bit less of a scatterbrain than Auna but struggles to be taken seriously.
One of the stolluks from the rooftop gardens doing extra garden work due to Farqua's disappearance.
From the Niatheia City
April's mum. She's a very busy person.
A cop. Calls people bastards and chases kids on bikes.
Duanaste's workmate and also chases kids on bikes. Desparate for bakery breaks.
Inspects tickets. Got called a bastard by Duanaste.