How to get "Proper Bow"

[Corinne]

I had no idea it was in the game until someone used it, I must know how to get it. Does anyone know?

[HEATSCAPE]

Im pretty sure you get it from interacting with Yuria of Londor. Don't take my word for it though, might want to check on the Wiki

[Ratselhaft]

Yellowfinger Heyshal gives it if you summon her in Farron Keep near the tower full of slugs.

Not exactly sure on the requisites to get her as a summon though as i still refuse to read the wikis but i'm sure they will be in there.

[Titan Exodos]

you need to have yellowfinger heysel invade you in the crucifixtion woods and in farron keep and you need to kill her both times, after that go give rosaria one pale tongue, then return to the keep ruins bonfire and you will see heysels summon sign near the tower with all the slugs. WARNING this will ruin sirris's questline early on in her questline, there is no way around it.

[Lumina]

First you must kill 2 times the NPC invader Yellowfinger Heyzel. After this you have to give one tongue to Rosaria. Now you can summon Yellowfinger Heyzel in Farron keep. She will teach you the proper bow.
The Abyss Watchers must be alive to get it.