In the first episode of Season 1, Chasing of Hate was the key focus. Being the first monster the player encounters, it was only reasonable for it to be the first episode.
Chasing of Hate used to be a simple static mesh, but now that Season 1 has released, it looks far more hateful. A few of the features added to Chasing of Hate are below.
New Static Mesh
Since hate is so common, an animal was desired for this emotion, as animals are very common too. The animal chosen was a snake. Snakes are often seen as angry and hostile, and given how common they are and how well known they are for their aggression, it was a reasonable choice.
Animations
Before, Hate simply reached the player, applied damage, and that was it. Now it has a movement animation, an idle, and a strike animation.
Texturing
Hate wasn't meant to be any ordinary snake. Its glowing veins, combined with its glowing eyes, make it feel unsettling.
SFX
Like the animations, sound effects didn't exist before. Now Hate has the iconic snake sounds: its slither, hiss, and strike.
It was decided that each sub-emotion should feel like a part of the region it's in, rather than simply existing there. It has to feel like it belongs. Most sub-emotions in the game don't, which is why Seasons 1 through 4 have that as the primary objective.