A: When that mouse came into the village, he came on a mission of peace, on a fact finding mission. He came to do no harm. He came to observe. What he saw made him sick.
He saw other mice mistreated, abused, slaughtered. He watched his best friend die, blown to pieces by a landmine. He had his new found love die in his arms, a victim of a bullet meant for him. He saw corruption and sadism on a grand scale. He saw a land where life had no meaning.
That mouse had enough. He decided to stand up for those who can not stand, fight back for those who can not fight. That mouse decided to wage a one-man war against tyranny and oppression.
That's why he tied his boats real tight. That's why he slid that knife into the sheath so hard. That's why he donned that red bandanna. A mouse binds his head because he means business. That mouse means business.
We should probably kill him before he fires that flaming arrow.