▁D unst an ▁as ▁S pl inter : ▁the ▁T urt les ' ▁sense i ▁and ▁adopted ▁father , ▁who ▁comes ▁to ▁realize ▁his ▁dest iny ▁as ▁a ▁guard ian ▁of ▁the ▁Ut rom s . ▁( 2 1 ▁episodes ▁( has ▁no ▁lines ▁in ▁episode ▁ 2 )) ▁ ▁Scott ie ▁Ray ▁as ▁Ch ' rell / O ro ku ▁S aki / The ▁Sh red der : ▁the ▁main ▁ant agon ist ▁of ▁the ▁series ▁and ▁the ▁leader ▁of ▁the ▁Foot ▁Cl an , ▁who ▁uses ▁his ▁wealth ▁to ▁help ▁repair ▁New ▁York ▁for ▁an ▁ul terior ▁mot ive . ▁( 9 ▁episodes ) ▁ ▁Ver onica ▁Taylor ▁as ▁April : ▁an ▁al ly ▁of ▁the ▁T urt les ▁who ▁enters ▁a ▁relationship ▁with ▁Case y . ▁( 1 4 ▁episodes ▁( has ▁no ▁lines ▁in ▁episodes ▁ 4 ▁and ▁ 2 6 )) ▁ ▁Marc ▁Thompson ▁as ▁Case y : ▁an ▁al ly ▁of ▁the ▁T urt les ▁who ▁enters ▁a ▁relationship ▁with ▁April . ▁( 1 5 ▁episodes ) ▁ ▁Scott ▁Williams ▁as ▁Stock man : ▁a ▁brilliant ▁scient ist ▁who ▁often ▁attempts ▁to ▁sab ot age ▁the ▁Sh red der ▁for ▁his ▁own ▁personal ▁gain . ▁( 8 ▁episodes ) ▁ ▁Kar en ▁Ne ill ▁as ▁Kar ai : ▁the ▁Sh red der ' s ▁adopted ▁daughter ▁and ▁second - in - command , ▁whose ▁alleg iance ▁and ▁devoted ▁service ▁come ▁into ▁question , ▁as ▁Leon ardo ▁tries ▁to ▁conv ince ▁her ▁to ▁change ▁sides . ▁ ▁Rec