>>936871550
I'm pretty sure the Attendants are specifically made to contrast the game and rest of the cast. Something their respective MC needs deep down but can't have otherwise.
For Door-kun and it's a bubbly energetic girl who wants to learn about the world to contrast the dreary, dark world and more grounded girls he can date.
For Yu, it's an older and more serious woman with all her priorities in order to contrast the younger girls with inner conflicts he can date.
For Joker, Lavenza is a cute, loving young girl he can care for and protect to contrast the corrupt adult world and hags he can date.