Think about it... preliminarily
Ichago = Buffy -
Inoue = Willow -
Chad = Angel -
Ishida = Xander - These 4 make up the core of the scooby gang
Sandal-Hat = Giles
Tatsuki = Tara (not so much power, possibly a lesbian)
the Cat = Wesley
Kun = spike (harmless but would like to believe he's not)
Rukia = Faith (the other slayer/shingami)

That about covers it... any other similarites you all can think of?