Oh no, it looks like it was getting a little bit too warm where Alef lives. Fortunately Lumi's here to help him cool down!

As far as size changing goes, Lumi is unsurpassed within my cast, and sizing up big enough to balance a city on her clawtip, and / or sizing back down again with the city still there is well within her abilities! The same goes for other macros and other such threats if the need arose.

She is still absolutely scared of growing too big and being unable to stop, so her own concerns are still definitely the upper limit to her power.