tohno akiha, tohno shiki, tsukihime, step-brother and step-sister, 00s, 1boy, 1girl, bad proportions, blue eyes, blue hair, brother and sister, brother and step-sister, brown eyes, glint, hairband, holding, holding weapon, knife, looking at viewer, parted lips, poorly drawn, red hair, reverse grip, school uniform, serious, short hair, siblings, step-siblings, tears, teeth, upper body, weapon, zoom layer