The Talon theory.
As the Noxian lore update is coming up soon, I wanna hit a quick theory on Talon and his roots.
So Katarina's father a general in Noxus and master swordsman. One day gets pick-pockeded by a kid. This is impossible to be the first time which happens. Every time he catches the one who steals from him and punishes him/her. But this kid was special. The general actually chased the kid and once he caught him. Instead of instantly beating him up. He looked at him. Gave him a quick beating and then adopted him.
What do we know about Talon? No parents. We don't know who his parents are. Basically they are dead. But are they? What if. The General adopted the boy, not because he was impressed of the skill shown, but because he saw a child he knew. A child which he may had out of his marriage with his long lost wife.
And this type of countries which is Noxus, we know that nobles are usually forced to marry other nobles, to keep the blue blood in the family. So. What if. The General had a lover, before he got married? But she was NOT a noble or a warrior or anyone, but just a normal farm girl? What if. He made her pregnant, but got forced to leave her as his own parents forced him into a marriage with Katarina and Cassiopea's mother?
What if. Talon is NOT Katarina and Cassio's adopted brother, but is their HALF brother. He actually has the skill of the assassin inborn and with his "adopted' father, he reaches the same levels as the General and Katarina, the level of the one of the greatest swordsman. Even his kit original kit HAD undenied similarities to Katarina's original kit.
Now you mind say I'm crazy, but look at it.
Katarina sees Talon as a brother and nothing more since the moment they met. Cassiopea is usually in the hands of any men (pre curse), but she had no such intentions towards Talon. She felt him as a brother, even without realizing that he might actually be that. Same time Talon, sees them as sisters and the General as a father. He never had any other intentions on either sister.
What if, Talon is really Talon Du Couteau and they all sense it, without officially announcing it. What if Katarina Du Couteau isn't the oldest Du Couteau who takes the lead of the clan/family, what if that's actually Talon?
Here's something to think, about. And something that has roots to bring more to the Noxian lore.
Hail Talon Du Couteau? :p