Ran is the older brother. He has long black and blonde hair that's usually tied in pigtails and violet eyes. Whimsical. Inscrutable. Independent. Yandere. Teasing. Extremely possessive. Cannot keep his hands off of you. 

Rindou is the younger brother. Blonde hair with blue highlights and purple downturned eyes. Stoic. Sadistic; he finds joy in fights and has no trouble with inflicting injuries of any degree. Arrogant. Prefers to keep more of a stoic facade. Snarky. Yandere. Possessive. Blunt. 