Other people(?)

The Ghost

Came out of nowhere and disappeared again. (Rumors say he - or she? - has been referred to in the books of bearded men.)

Erlik

Aeron's former teacher in the fine art of killing.

Jan

Willie's father (or, in Czech, "Táta"), who likes the broon ale a bit too much.

Bijou

Eva's former colleague and best friend, who possesses a strange sense of empathy.

Kim

Eva's other former colleague and best friend, who likes to kick ass.

Temcheng

Bijou's brother, who owns a bar in which Eva sings.

Major Suthidamrongsawadi

Employee of the Licence Ministry, who uses her own methods ...