There was an underground
organization hidden in the shadows which went by the name "Bird of Passage".
They were affiliated with no single side, forming contracts with the powerful
and sending out assassins to eliminate important figures. The group kept
its existence in secret, influencing the history of Europe from behind
the scenes. Tira was raised by the group since childhood, stripped of her
freedom and choice for her future. Since her younger days she grew accustomed
to taking the lives of others without feeling anything. The act of killing
became a regular routine in her life, so much that she needs to kill on
a regular basis for the stimulation it provides.
Tira worked to improve
her skills with a cheerful demeanor, as if she enjoyed her job, but even
herself wasn't aware that it was only to hide her true feelings. Tira was
in the middle of a mission when the Evil Seed rained down. The leader's
mind was burnt by the evil energy and the chain of command collapsed. Suddenly
Tira was free from the underground and into the outside world. Eventually
she forgot where she was when this event happened.
For a while Tira lived
with an ordinary family in a quiet city among normal people. Unlike the
world she had come from, nothing here satisfied her desire, but she thought
that this lifestyle could be okay. But soon enough her peaceful days ended;
one day she had set free the family's child bird pet without a clear reason
and was scolded. That simple event triggered her dormant killing desire.
By the time she realized what happened, she was in front of the corpse
of her former "family". Realizing she couldn't live without killing, Tira
began an aimless wandering, killing as she went.
One day she came to
know the massacres caused by Nightmare.
Her heart leapt at the thought of finding someone like herself. She tracked
the Azure Knight and reached Ostrheinsburg, where she met a man carrying
a scythe. The man revealed her that what she sought was the wicked sword
Soul Edge, and that Nightmare was just a puppet. Tira was somewhat disappointed
for the revelation, but a short time later she heard rumors of the Azure
Knight's reappareance. She followed the trail of slaughters and finally
found Nightmare, the bringer of destruction and despair beyond her wildest
dreams. finally finding someone to give herself entirely, she turned into
the sword's faithful servant.
Now Tira operates
secretly behind the scenes with two set objectives: destroy the spirit
sword, and thus breaking the seal over Soul Edge's body; and locate a new
host for the cursed sword, since his actual body is an unstable temporal
shell and he needs a host with both strong spiritual will and a body to operate.