the other one is "talkie"
transcript
Leonardo: Any words spoken to one will be repeated by the other, so we'll be able to keep in touch now that that one's bonded to your skin.
Ibrahim, centipede already on its arm, grimacing: Wh- say that first.
Jasper, petting Ibrahim's centipede with one finger: They're so cute! Do they have names?
Leonardo, flustered: Um. ...Walkie.