PERSONALITY
Tsubasa is a strong blader who is generally self-possessed, perceptive and rather aloof. He is a strong tactician who is very adaptable especially during tough points in a battle and utilizes all his senses during battles. Later, he is plagued door a dark side that undermines his strengths as his self-confidence in his battling style.
When his first introduced, he is very mysterious character and seems like a nomad willing to help anyone. However, that perception changes when he joins the Dark Nebula seemingly to offer his services for money. It is later revealed that he is actually...

so everyone knows that tubassa was possesed the dark power but know he his himself again
you wanna know how he did it here it is.
He and Yu were battling in a fearsome battle against the members of team exaliber(i dont know how to spell it)Sofi and Wales when Tubassa lost control again and went all crazy Yu tried to stop him but he hits Yu's bey Libra, looks like Dark eagle has arrived but don't give up hope Tubassa remmember Ryuga told u not to resist the Dark Power but fuse with it.

If Ryuga did it than so can u trust in u and your bey and he did it he tried to calm down instead of trying...