Lumi just said she has a Master's in "Engineering", btw. Hasn't said what kind of engineering. Has she said anything that specific about her degree before?
(She could be lying, obviously, but it's not implausible)
EDIT:
Why? I thought it was something in STEM because of her references to doing tasks in a "lab".
That makes sense. I think she said her parents were scientists, so I kind of assumed she was in science rather than engineering.