Yagiya Express
From Shin Megami Tensei IMAGINE Wiki
Yagiya Express are a small demon-like creature who run shops beside Yagiya inside dungeon. You can buy stopwatch for G1 Trial, exchange Yagiya Seals for prize, exchange 5 Yagiya Seals for a lottery, and report a time for G1 Trial. Some of them will have Demonic Compendium Memory for sale at certain Moon Phases.