The Story of Gnar
Gnar is a yordle — but an ancient one, frozen in ice during the Freljord's prehistory and thawed out in the present day, which makes him among the oldest yordles alive and also completely unprepared for how much everything has changed. He remembers the megafauna he hunted. He does not understand why the large creatures he encounters now react to him with confusion rather than predator recognition.
His body has a condition: when he becomes sufficiently agitated or frightened, he transforms from a small, curious yordle into Mega Gnar — a massive, powerful creature driven by the oldest fight-or-flight responses, who does not think so much as react. Mega Gnar is enormously strong, destructive, and eventually exhausted enough to revert. The transformation is involuntary. Gnar's feelings about it are complicated, insofar as Gnar has complex feelings, which is intermittently.
He engages with the current Freljord with the curiosity of a creature who has no framework for most of what he encounters and who is too old and too fundamentally yordle to let this stop him from investigating. He finds things interesting. He collects things. He tries to communicate with the beings he meets using a vocabulary that has not been updated in several thousand years. The Freljord he woke up to is stranger than anything he hunted in his own time. This has not, so far, discouraged him.