There's not much to say since it's just the first chapter, but I think I can point out something:

1-The hooded figure should be a friendly guy who gives warnings to heroes so they can save the day (like the prophet in some fics and even games, WC3 for example). If he was a baddie, and a seemingly powerful one as shown in the chapter's end, why didn't he turn Keiy into jerky at the first place?

2-Rangers usually carry a dagger or short sword for melee combat, but just ONE. Using dual swords is rather unreasonable, not to mention unwieldy in carriage (let's list them out, a scimitar and a short sword, both with a sheath, a bow, and a quiver. It's just me, but I can't seem to find a way to bring them all.)
Also, only very seasoned swordsmen would dare challenge incoming arrows with their swords. If it were me, I would fall aside, roll over and shot back with my bow.

3-The horse can speak? Unless you put in some words explaining the enchantment it has (there ought to be one), I find this the most irrational part. In this case I think you should replace him with someone who acts as the prince's bodyguard and possibly a good friend of his. He doesn't need to be good at fighting, he can even be a coward to strengthen the figure of the protagonist.

4-You forgot to describe the appearance of Keiy.

This is just my opinion , hope it can be of some help. Waiting for your next chapter!