Ok as a tech/theater person I have important questions on your most recent Lance head canon: does he participate in pre-show traditions and does he come out eating on stage at he end (my stage manager came out eating an apple during several shows, once a sandwich)
This is a critical question and I’m glad you asked it
Personally when I was in high school, our pre-show tradition was making a satanic circle and praying to the ghost of our former tech director’s mother so she wouldn’t wreck the show (………yeah).
Funny enough I think that Lance. Might have something similar? Not the satanic circle part, but we know that he and Keith believe in ghosts (they’re both really quick to accept that the castle is haunted) so consider this: Lance and Keith are the last two left during build one night. Coran’s wandered off… somewhere, maybe to check some lights or something. Lance and Keith are cleaning up and something happens, and they don’t really know what but the lights go out and Lance gets locked in a storage closet and Keith swears he was attacked and anyway the two of them walk away that night convinced their theatre’s haunted.
So lowkey before shows Lance starts like. Dropping by the supply closet and very nicely asking the ghosts to not wreck anything please and thank you. And Keith joins in and then it becomes a crew-wide thing and suddenly meeting up around the storage closet and talking to the ghosts is their main pre-show tradition.
Lance probably doesn’t come out on stage eating because Allura would straight up murder him (”no. food. in. my. theatre.”) and he doesn’t wanna die yet.
As for other weird shit, though, my high school also has this cow milker (we call it The Udders) and there’s a tradition where every show night one prop is swapped out for The Udders and the actor has to go on stage and keep acting like they’ve just got the normal prop (so like instead of a suitcase you’ve got this). I can totally see Pidge getting bored and swapping out a prop for something weird one night and then finding it so fucking funny that she just keeps doing it. It becomes a weird thing people look forward to.