
Originally Posted by
Vulcwen
So about that:
It's surprising that apparently a beasttribe can become an auspice, but then, they're turtle-people, so perhaps their lifespan is large enough that some individuals can get to the point they obtain auspice powers. Tenzen as far as I understood was a warrior of light (having the echo, having a crystal, the auspices mentioning our WoL is similar to him).
Pretty sure it's more than just the longevity of the species. If that were the case, there's no way that any tiger (Byakko) would ever become an auspice. Tigers rarely live longer than twenty-five years, far short of the necessary span to become an auspice. There was something special about Byakko that gave him the potential to become one, and I presumed that that specialness applied to Tenzen, as well. The same applies to most of the other species we see in the Four Lords storyline.
As for Soroban, bear in mind that the box aged him so that he could become an auspice, but age isn't what kills people. It's the age-associated breakdown of bodily functions that does you in. Because this is artificial, magical aging, it's entirely possible that Soroban could be aged well past the normal limits of his people. If he stayed that way for too long, his body would start to fail (had he not become an auspice), but thankfully the magic of the box was temporary. I'd say that this chapter of the story alone isn't enough to draw the conclusion that Kojin, as a species, live long enough to become Auspices, but it's certainly possible that certain special individuals (like in the case of Byakko - and Tenzen?) might.