Haru does love Legosi in the manga. It's evident in the way she cares for him, shows concern, and their shared experiences strengthen their bond, making it clear that her emotions towards him are those of love.
Sure, Legosi and Haru do get together in the manga. Their relationship develops over time, facing various challenges but ultimately finding their way to each other.
The 'redemption arc' trope can be seen in some 'legosi x oc fanfic' too. Maybe the OC has a troubled past or has made mistakes, and Legosi is there to support them through their journey of self - improvement. It gives a sense of growth and positive change in the relationship between Legosi and the OC. There's also the 'mystery OC' trope where the OC has some secrets that Legosi gradually uncovers as the story progresses, keeping the reader engaged.
I'm not sure who exactly Louis Bird is in 'Louis Bird Telling Our Stories' without more context. It could be an author, a storyteller, or someone with a personal collection of stories to share.
Well, another place to look for 'legosi x oc fanfic' could be Wattpad. There are a lot of fanfic writers on Wattpad who write about different anime and manga pairings. Just use the search function and type in 'legosi x oc fanfic'. However, the quality might vary, so you may need to do some sifting through the results.