I've been into mixing Anime with the Lantern Corps from "Green Lantern" comics and there's a corps for each color and emotion (drive) for those who don't know.
So here's the emotion/drive that matches the characters form Inuyasha.
Inuyasha = "The Red Lantern Corps of Rage" because he's very fierce looking when ever he gets pissed and easily one of my top 5 angriest anime heros.
Naraku = "The Orange Lantern Corps of Avarice" because he's the antagonist who's driven by his own greed for power.
Sesshomaru = "The Sinestro (Yellow) Corps of Fear because he is very frighting to those of weak will.
Sango = "The Green Lantern Corps of Willpower" because she's determined to avenge the death of her family.
Miroku = "The Blue Lantern Corps of Hope" because he's hoping to get some ass! lol
Kikyo = "The Indigo Tribe of Compassion" because that's what priestess are pictured as, Compassionate.
Kagome = "The Violet Sapphire Corps of Love" because well she's the love interest character.