Cyndi is the only shown member of the Vehicle Squad and speaks in a combination of English and Japanese, though her lines have usually been short, such as "me too" and "roger." She addresses Kanade as "Boss." She is in love with Pucchan, and later confesses to him (Pucchan never turned her down). Everyone else, however, do point out that "Wait!! He's a puppet!"
Cyndi is later found to be, in fact, quite adept and aware of the situation around her. In episode 25, Cyndi can speak Japanese fluently but it is later revealed that she never spoke it properly because her mother (who speaks in a highly rude manner much like gangsters picking a fight) told her she was not speaking it right.[Wikipedia]