Naraku blasts poison at Starfire, Starfire charges straight through it, being completely immune. Naraku, being caught by surprise, raises a bariier. Starfire Smashes into said barrier, glowing green with the power of her people she pushes through.
Naraku raises multiple tentacles in her way, trying to keep him from his vulnerable center. Starfire takes advantage of this and grabs said tentacles flying up in the air. and swinging him around. Naraku, surprised by the girl's alien strength, sends his body in mid-air to try and absorb her.
Enclosed on all sides by her enemy, starfires eyes glow a brilliant electric green, as she expels bright emerald energy from her body in all directs, shattering the rest of Naraku's body. While looking at the falling peices of her opponent, Starfire notices the hundreds of peices strating to bod together and yells in surprise.
As soon as Naraku's head is fully formed, he looks up just in time to see a barrage of green enrgy orbs assailing his still-mutilated flesh. At this point Naraku decides discretion may be the better course and slinks away.
Starfire has a counter for everything Naraku can do.