Original: Captain Gantu ( voiced by Kevin Michael Richardson ) 625/Reuben ( voiced by Rob Paulsen ) Dr. Jacques von Hämsterviel ( voiced by Jeff Bennett ) Mertle Edmonds ( voiced by Liliana Mumy ) 624/Angel ( voiced by Tara Strong ) Recurring David Kawena ( voiced by Jason Scott Lee and Dee Bradley Baker ) -- Nani 's boyfriend .
Simplified: Characters 626/Stitch ( voiced by Chris Sanders and Michael Yingling ) Lilo Pelekai ( voiced by Daveigh Chase ) Dr. Jumba Jookiba ( voiced by David Ogden Stiers ) Agent Wendy Pleakley ( voiced by Kevin McDonald ) Nani Pelekai ( voiced by Tia Carrere ) Lilo 's older sister .