^^ By virtue of being in heat every time she's around Shimamura, Adachi is invulnerable to freezing temperatures. She'd melt a hole right through the South Pole if Shimamura called her while she was on an expedition.
This image captures Edelgard rather well. She seems like the type of person who'd brood first thing in the morning after frantically shoving her Byleth fanfics under the covers the moment her wife stirs.