When Felix is talking to a little girl the rescued and she calls him brave. It makes him all flustered.
After years away and losing friends or seeing them hurt badly, they see the same little girl all grown up and following in their asskicking, name taking, chaos slaying foot steps. Her first words when she reconizes them? My Heroes!
They're rare, but there are moments where Gotrek lets slip a little bit that he values Felix. Most notable is that nearly every time a dwarf trash talks Felix, Gotrek is quick to jump to his defense.