Penny Polendina

A robot created by Pietro Polendina. Penny is amiable, excitable, kind and curious. She often shows a distinct lack of social awareness, likely due to not having a lot of experience with Human nature. When Ruby makes an unconditional offer of friendship, Penny seems both immensely pleased and somewhat surprised. Another small quirk is that Penny hiccups whenever she tells a lie.

(Source: RWBY Wiki)