Pasco's design was based on Main Hiiragi (柊まいん,Hiiragi Main), a character from the anime "Cooking Idol Ai! Mai! Main!" which is voiced (and sometimes portrayed) by Haruka Fukuhara, who also portrays Lady.
Pasco's name was derived from rechargeable card tickets for Japanese Railway System, which are Pasca and Pasmo.
Coincidentally, Pasco rhymes with Basco, the name of a villain in Gokaiger.
Unlike Ticket, who is a puppet with a high level of sentience and is capable of moving onto multiple hosts, Pasco's actions are fully controlled by Lady.