Shiki came from a distant land, where packs were in a constant state of fighting. After a deadly battle with a rival pack, he drifted across the sea onto another continent. He then wandered aimlessly until meeting Yumiko in the deciduous forest.
Shiki has a vulgar way of speaking, which is a remnant of the culture of the pack he originated from. All the wolves in his pack respect him for giving them a new opportunity in life. Shiki names all of the new pack members himself, as a way of signifying the second chance and "rebirth" he gives to new wolves. This is also done as a way to continue the culture of his original pack. He expects more of wolves with red fur or markings, as this was seen as a sign of leadership in his homeland. For this reason, he spends more time with Longwei in order to teach him what it means to be a leader.
Shiki also believes khaki fur to be a curse, and refuses to allow any wolf with the coloring into the pack. It is said from his homeland that khaki fur brings misfortune and evil.