Übel might be unlucky, but she's great reading the others. She knew that ~~glasses~~ Land would help her out. Frieren getting all excited with dungeon exploring, Denken's tactical retreat...
Fern might not demonstrate emotions often, but when she does it, everybody pays attention. I love how she got jealous of Frieren being hugged, like a kid saying "don't steal my mum!".
She grew up into an amazing mage though. To the point that she's confident that she can overpower her master.