Amadeo was born in Lastwall, and all his youth he was educated with stories of good deeds and duty.
His mother was a paladin and his father a cleric of Iomedae.
Both his parents loved him dearly, though they hadn't much time for family life.
His older brother, Stavro, was a skilled fighter whom he greatly admired.
One day, Amadeo's mother disappeared while on an expedition beyond the Wardstones which guard the ruined realm of Sarkoris, now subsumed into the abyssal pit of the Worlwound.
His father wanted to go in search of his wife, but Lastwall's military command forbade it, because they feared a major assault was coming from the demonic forces and they needed all the able-bodied men they could get to defend the city's walls.
So his father stayed in the city and prepared for battle.
But Amadeo's older brother couldn't resolve himself to abandon all hope, so he set off alone in a desperate expedition to rescue their mother.
Amadeo wanted to come with him, but Stavro sneaked alone under the cover of night to prevent it.
Then the demonic assault came, and Amadeo did his part. The demons were repelled, but many defenders were killed, and his own father was grievously wounded.
His father summoned his son to his deathbed to bid him goodbye.
"I wish you wouldn't die" said Amadeo.
"I give my life to the greater good" answered his father.
And then he died.
That night, while Amadeo was awake and mourning the remains of his father, an eldritch vortex opened and he saw coming out of it an evil apparition in the likeness of his mother.
She taunted him, saying she had flayed Stavro out of his skin when he came to rescue her, before eating him alive, and that she was now a good whore servicing the mighty demon lords of the Abyss.
"Iomedae, save my mother !" pleaded Amadeo.
The goddess didn't respond to his pleas, but Lastwall's soldiers, summoned by his cries, ran to the scene and were able to destroy his mother.
Amadeo couldn't sleep for a full week after all that horror.
Finally, he was able to fall asleep only after a singular train of thought had bore itself deeply into his foggy mind.
There's no greater good.
Only the good you do to yourself, and to those whom you are loyal to.
These have been the core tenets of his personal philosophy of life until now.
After he left Lastwall, Amadeo wandered across Avistan, coming soon across the Scarzni, who, although they were not always savory individuals, were able to provide him with a sense of family, of belonging and of taking care of their own.
He learned their language, their customs - and finally their criminal trade.
After some years of the wandering life, Amadeo learned of the Pathfinder Society, and its fabled headquarters in Absalom.
Although he was doing good for himself at that time, he felt he needed to aspire to some greater ideal.
The bizarre and self-centered nature of the Pathfinder Society members, as well as their dreams of wealth and immortality through fame and recounting of daring tales of adventure, appealed to him, and he boarded a ship in the harbor of Korvosa, en route for the grand City at the Center of the World.
He's just arrived and he is anxious to tread the path of high adventure - as long as his Scarzni fellows guard his back a little bit.
Amadeo likes to live the good life, and is a little bit obsessed with amassing wealth.
Besides that, he appears as a charming, tolerant and laid-back criminal. He is however fiercely loyal to members of his Pathfinder faction.
Owing to the peculiarities of his education, Amadeo is still a very religious man, and of late a worshiper of Calistria.
He has a strange sacred/casual relationship to his goddess, which could best be summarized as:
"I scratch your back and you scratch mine."