: The depth and development of characters would be crucial. Are the characters well-fleshed out? Do they grow or change significantly over the course of the story?
(Note: "Shinseki" is likely a surname or place name. 「お泊まり」 means overnight stay/sleepover.) : The depth and development of characters would be crucial
How to or accept an invitation to stay over. Anime List - Page 2 - AniDB : The depth and development of characters would be crucial