Allister is a young boy with pale skin and purple eyes. His black hair is fairly short, but with a few long strands in the front and a long curved cowlick at the back. On his face is a white mask with large holes for his eyes and mouth with motifs that looks similar to Corsola's motifs on the sides. His outfit consists of a long-sleeved black shirt and shorts. Around the ends of the sleeves are rings of light purple— a pair on each one, and on the right sleeve is the Galar league symbol. His shirt has a purple and gold upside-down triangle on the front with a black and gold spirit-like shape in the middle.
