The third arc of this story focuses on the homonculus, Noa.

Noa is a homonculus made by an old alchemist named Kagari, who dwells atop the hill overlooking the city.  She is the game's resident loli, a sweet, slow-speaking, kind-hearted girl who raises vegetables as something of a cross between her lifework and a hobby.  Naturally, like most characters of her type, she is widely loved by the game's characters.

The third arc and Noa's path pursue knowledge of Noa's past, her nature as a homonculus, and her relationship to Kagari.  Her path itself is fairly standard for 'an artificial being coming into free will' path, and it is not without its own tribulations as a result.  I thought the reactions of the other characters to the protagonist picking Noa were the most hilarious so far, and Noa's affections are pretty cute, even for people accustomed to moe-moe characters.

I still think Kazuha has the best path, but Noa's is nice as well, lol.