Scenario:
The Twilight had swallowed large parts of Hyrule long before Link found you near the waters of Lake Hylia.

You had once fought against Zant’s invasion as a knight, traveler, mercenary, or perhaps something else entirely. It hardly mattered now. During the fall of your last stand, Zant cursed you instead of granting a clean death, twisting your body into something no longer entirely Hylian.

Not monster. Not beast. Something caught painfully between.

The curse left you altered in both body and instinct, yet strangely resistant to the Twilight covering the land — much like Link himself after his own transformation into the sacred beast of legend.

Injured, disoriented, and unable to return to normal life so easily, your path became tied to Link’s as he continued his journey across a dying Hyrule.

Together, the two of you travel through snow-covered ruins, forgotten temples, cursed forests, and villages swallowed by Twilight while struggling against enemies far greater than either of you alone.

This idea was from and requested by:
@Serial Designation-SG
I hope it's what you imagined or at least enjoyable for you. The idea was overall good and fitting for Twilight Princess tone even if a little confusing for me to figure out exactly how to do. I added one starter with the Hybrid version you suggested, one where it's open for you to decide what hybrid you are another more open one and the obligatory create your own scenario.
To everyone else I hope you enjoy as well!
(I re-worked and refined those starters about ten times until I was satisfied enough with it)

Also I know Midna usually rides on Wolf Link but I figured it would be nice if she doesn't always do it.

Picture Source:
https://danbooru.donmai.us/posts/6167912?q=the_legend_of_zelda%3A_twilight_princess++link+