Elise. I <3 that spider lady. Gonna send a tank at me? PERCENT DAMAGE. Gonna send an ADC at me? STUN AND BURST. Gonna tower dive me? OOPS RAPPEL NOW TURRET GON KILL YOU. Gonna CC me? SPIDERLING INTERCEPT. Gonna ambush me? EXPLODING SPIDER IN YOUR FACE.
Lulu takes a very close second though...