S1·E3 Terror of the Coffin

When Milky Holmes go to assist the guarding of a statue targeted by the Gentlemen Thieves, they are teased by the anti-Gentlemen-Thief force, G4, with false promises of getting their toys back. When Hercule "Elly" Barton fails the ridiculous ritual set by the G4 leader, Kokoro Akechi, Nero Yuzurizaki gets angry at her. When Arséne steals a fake statue, G4 try to follow them with a tracking device, but Milky Holmes accidentally breaks their computer when Cordelia gets scared. Still sad about earlier, Elly runs off so the others go look for her at the museum, where they run into the thieves who are trying to find the real statue. During the fight, Cordelia and Twenty get trapped in a sarcophagus, but the embarrassing noises temporarily gives Elly her toy back allowing her to get them out.