Asteion (αστειον) means "refined" in Greek. This name originally belonged to the stillborn baby of a pair of snow leopards belonging to Claus Ingvalt, Einhard's ancestor, and was picked by Olivie Sägebrecht. Einhard has nicknamed her Device Tio (ティオ Tio). Wendi Nakajima has also nicknamed Asteion Neko-nyan; neko is Japanese for "cat" while nyan is a combination of nya (Japanese for "meow") and Japanese honorifics.