Siro is a lion-like Yo-kai who is a recolored version of Blazion where his color scheme is gray, white, and fainted teal or neon blue. It's mane is mostly white, while accentuating it with some teal color, to make it look like flames. Similar to Massiface, Siro has a small white scar on his forehead, to represent wounds from battles. It has neon blue swirls on its arms, and its skin color is a pale gray. Its eyes share the color scheme with the rest of it: its eyes are gray and neon blue. Siro is wearing a white top and dark gray pants with neon blue hems.
Siro can rarely be found on the Mt. Wildwood Trail (left path from Mt. Wildwood Summit). He can also be freed from the Crank-a-kai using a Red Coin in the present. Another way to find Siro is in Gates of Whimsy.
This shows Siro's stat on level: 99.
NOTE: Remember that Siro won't always end up having these stats at 99 due to attitude.