Não podemos ter 100% de certeza de onde ele é, mas parece incrivelmente provável que ele seja Qohorik. Sabemos que Qohor é o único lugar que afirma saber como trabalhar a Valyrian Steel.
The properties of Valyrian steel are well-known, and are the result of both folding iron many times to balance and remove impurities, and the use of spells—or at least arts we do not know—to give unnatural strength to the resulting steel. Those arts are now lost, though the smiths of Qohor claim to still know magics for reworking Valyrian steel without losing its strength or unsurpassed ability to hold an edge.
The World of Ice and Fire, Ancient History: Valyria’s Children
Também sabemos que foi Tobho que retrabalhou Ice no Wail e Oathkeeper da Viúva e, a partir de sua citação, sabemos que ele aprendeu isso em Qohor.
"You have done good work, Master Mott," Lord Tywin told the armorer. "My steward will see to your payment. And remember, rubies for the scabbards."
A Storm of Swords, Tyrion IV
E sabemos que ele é muito bom em colocar cor em metal, ele até tem um pouco de vermelho no aço valiriano.
"Nor I, my lord," said the armorer. "I confess, these colors were not what I intended, and I do not know that I could duplicate them. Your lord father had asked for the crimson of your House, and it was that color I set out to infuse into the metal. But Valyrian steel is stubborn. These old swords remember, it is said, and they do not change easily. I worked half a hundred spells and brightened the red time and time again, but always the color would darken, as if the blade was drinking the sun from it. And some folds would not take the red at all, as you can see. If my lords of Lannister are displeased, I will of course try again, as many times as you should require, but—"
A Storm of Swords, Tyrion IV
Nós também sabemos que os ferreiros em Qohor sabem como colocar cor em aço, então a evidência sugere que ele definitivamente treinou em Qohor. Vendo que ele era um menino quando treinou, parece provável que ele seja pelo menos das Cidades Livres ou pelo menos de Essos.The Knight of Flowers bought all his armor here, Tobho boasted, and many high lords, the ones who knew fine steel, and even Lord Renly, the king's own brother. Perhaps the Hand had seen Lord Renly's new armor, the green plate with the golden antlers? No other armorer in the city could get that deep a green; he knew the secret of putting color in the steel itself, paint and enamel were the crutches of a journeyman.
A Game of Thrones, Eddard VI
Por fim, ouvimos que esses segredos de Qohor são bem guardados, então parece muito improvável que eles os entreguem a um estranho, especialmente um menino. Com tudo isso junto, eu diria que é 99,99% de certeza de que ele é Qohorik, embora sem uma citação explícita, não posso dizer com certeza.Qohorik swords, knives, and armor are superior to even the best castle-forged steel of Westeros, and the city's smiths have perfected the art of infusing deep color into the metals of their work, producing armor and weaponry of lasting beauty.
The World of Ice and Fire, The Free Cities: Qohor
Only here, in all the world, has the art of reworking Valyrian steel been preserved, its secrets jealously guarded.
...
Maester Pol's treatise on Qohorik metalworking, written during several years of residence in the Free City, reveals just how jealously the secrets are guarded: He was thrice publicly whipped and cast out from the city for making too many inquiries. The final time, his hand was also removed following the allegation that he stole a Valyrian steel blade. According to Pol, the true reason for his final exile was his discovery of blood sacrifices—including the killing of slaves as young as infants—which the Qohorik smiths used in their efforts to produce a steel to equal that of the Freehold.
The World of Ice and Fire, The Free Cities: Qohor