Phew, this story is a rollercoaster of emotions and one unique ride of a high-concept isekai. It's a strong start and finish with a solid character-driven plot, leveraging the found family trope.
There was a risk with the POV switch between 1st person and 3rd limited. But, because of the type of story this is, it worked perfectly. It pretty much is the only way to do a voice switch.
I was a bit confused with some scenes at the end with the dungeon arc, but the writing wrapped it all up nicely in the final chapters.
I like how the story reinvented transmigration tropes to make it something fresh and its own thing. A very strong contender for the HF x Kado contest, and I wish it the best of luck.