Knowing that there would not be any threat from those who wanted to tear him down—at the very least until the issues—about the mutated animals' rampage were taken care of—Rex felt immense liberation, unlike anything he had ever felt.
It felt like he was back on Happiness Street before his biological parents were murdered.
No burdens, no nothing—he felt like a kid again.
Because of that—this battle against the mutated animal puts a bright smile on his face.
A mutated animal, no matter how strong, is in the end only an animal.
Compared to the atrocities and dangers a thinking being could do, this animal is nothing.
Rex was not scared of it, he was liberated by it.
From the expressions he was showing as he battled with the mutated animal—it was obvious to Flunra what he was experiencing right now. His joy and freedom were palpable to see, and that alone made him pity the mutated animal on the other side of the road.