I suddenly remembered this and thought of a kinda funny headcanon...
Imagine for just a second that the celestial spirits get annoyed that they get summoned every 5 minutes, but when they reach earthland they realize there's been at least 3 days in between summons for Lucy and now they have to hide their annoyance because they know it's not her fault that time flows differently in their world and to her she hasn't seen them in days even though to them it was just like 5 minutes ago.
Celestial spirits that are used often like Loki/Leo and Virgo are barely ever in the celestial spirit world if you think about it that way.
Like imagine getting home from work thinking you're gonna relax and then immediately getting called back in because even though it's only been a few minutes to you, it's been days to your boss and now the world's burning.















