Writing Quality: 3.5/5
Your writing itself is quite good, and there is adequate description in your chapters. The way you have described the interactions of Arun with other characters paints a clear picture of the scene. However, something that I would suggest you work on would be your grammar and mechanics. There are moments where you seem to have forgotten to use full stops/periods at the end of sentences. Also, please read up on the usage of colons. You've used them several times in sentences where a comma would be sufficient.
Stability of Updates: 5/5
You mentioned in your synopsis that you would update one chapter a day. So far, you have kept it ~
Story Development: 3.5/5
I actually quite like where your story is going so far. In the beginning, it gave a more 'slice-of-life' feeling, relaxing and comfortable to read. However, after the seventh chapter, there's a sense of mystery being aroused. The plot starts to pick up around here too, which is a plus.
Character Design: 4/5
With each character that you introduce, you have made sure to describe their physical features and also shown a bit of their personality through their actions and dialogue. I also like how you've given personality to the pets as well, it's one of the things that I enjoyed while reading your novel. There isn't much mention of Arun's past world or his personal motivations so far, but I'm sure you will/have included them in future chapters ~
World Background: 4/5
After reading the first chapter, I liked how you weaved in a bit of information regarding the world without dumping it bluntly on the reader. The concept of having pets as 'guardian angels' is interesting, as is the [Pet Pact]. Around the eighth and ninth chapter, Arun is taken on a journey to another location. I like how you have described the scenery/landscape of the 'world', although I would suggest you to add a bit more detail. This will help you to build a clearer picture of the world in your readers' mind.
E.g: In chapter nine, you describe the landscape of the territory Arun and Astera travel over. To add more depth and allow a deeper understanding of the world (the climate, features/characteristic etc), try to add in more sensory details.
sight, sound, smell, taste, touch.
//The climate had also changed dramatically. Due to the blistering heat, the vet was forced to remove his blouse. The sun's rays pounded down on them, and Arun lowered his head, seeking to hide from the glare.
Since they're flying, you could also mention the presence/absence of wind. While you don't have to add so much detail in every paragraph, making sure to include a few every so often will enhance the reading experience.