Emilio Getter (in Japanese エミリオ・ゲッター, sometimes playfully spelt エミリヲ) is officially the band's general manager, soul, and monitor. He's an E.M.I.G.L.I.O (Electronic Mechanical Industrial Generated for Logical Infiltration and Observation) remote-control robot toy designed in Italy.
These toys were distributed in Japan by SEGA under the name "DJ Emilio" and by Bandai under simply "Emilio". Anago have the SEGA model. It's a shame that they didn't keep the DJ part in his name... but giving him the name Getter is cute, so it's fine!
He's remote-controlled but to tell you the truth I don't know much about him in terms of what the band did with him on stage. I'm looking to buy a toy of my own, but they're stupid expensive to import to Australia. I've got one of my very own!