This chapter was a bit confusing. I think the three factions here are all going to different warehouses, or they'd have met each other... Right? Well, I guess the thief and the MC's faction went to the same one at least.
The atmosphere is fantastic in this manga. It feels so open and lighthearted, with really nice complimenting artwork. I'm a fan. i hope this quality keeps up.
The gate and walls look effective. They wouldn't be decorated because they aren't for show. Those are proper walls to keep undesirables and creatures out. Sheer, tall, solid walls and gates that open outwards.
Her mom is definitely the Queen. You can't just foreshadow her mom being strong and then introduce a mysterious 'queen' villain character without it being connected somehow.