Can We Get Some Lore About Yasuo, His Master, etc.?

How did he learn the wind style? Who taught him? is this something you're born with? What does his master think of the murder of the elder and why hasn't he said anything about it? Surely he can identify his students work or not. Why didn't they blame his master or say anything about him. Is his master still alive? What is Yasuo's sword? Is it special? is it just a sword? There are so many more questions I have, can we add more lore?