It could be one of the reasons he took sword fighting to vent his anger and become stronger and protect himself. but no one knows only ryu does and he would never reveal it.
Human, Plot Development, Pokemon, Series
"and finally, the winner will be invited to come to the qualifying matches for the
worldwide sword-fighting round. if you no longer wish to participate in the contest,
please leave the arena now."
Dragon, Dragoness, M/F, Oral, Romance, Violence
"a sword fight you want...a sword fight you'll get." a fire glowed in his eyes before he moved off the bar in quick fashion.
Adventure, Fighting, M/F, Young Love
Thanks to all the sword fighting for dummies i had read in the past, i started the movements to wake up a part of the body that would have gone numb from a strike to a certain point.
Pokemon, Swallowing
Plus, i have been training the warriors in sword fighting. that is not just to train them, it is to teach me the way the mory handle swords. this would help me against the ka'yno in a sword fight.
"so, i would like to ask you this.
Exercize, Harness, Hug, Ka' Mu-Naka, Kerga Tyarza, Leash, My-Ara, My-Rora, Nakymoty, William Watson, Zo-Joola, Zo-Kyta, embarrassment, smiles
Tsume: maybe his in another room
jake: good , let hurry and kick his ass (runs off)
as they were making their way across the path and fighting heartless they finally came to a room were they saw hades and a guy in red with a big sword fighting  
Kingdom Hearts
You wouldn't like it... it has too many sword fights and magical dragons."
almost instantly the little bunny was drawn in, though he knew how to play this game. to save some sort of dignity, he had to pretend he wasn't interested.
Adventure, Magic, Medieval, No-Yiff, RP, Roleplay, Roleplaying
My classes were: sword fighting, sorcery, leadership, and the class most every one was taking, adventuring.
"well, i found what i want, how bout you guys?"
Clean, No-Yiff, Story, classes
How many times do i have to tell you how to defend in a sword fight?"
choona and his partner, mo-ke'ka, stopped their sparring. choona said, "but--but, my ka', i was defending."
A-Deka, Arrows, Atlatl, Dauanka, Hunting, Jootaka, Jy-Choona, Katooeka, Mu-Naka, My-Ara, Te'-Maky, Training, William Watson, bow, quiver, spear, surprise
Season 2 upped the ante with a significantly darker story with more sword fighting, deaths, and betrayals. many trolls are lost in this season, including a few side characters, as well as a few humans eaten off screen.
Review, Trollhunters