Di Gi Charat
Most of the characters of Di Gi Charat originally debuted in the yonkoma "Gema Gema", and later appeared in the anime series. Across all of the Di Gi Charat series, each catgirl ends their sentence with a cat sounding suffix, such as Dejiko's "Nyo". The four DVDs of the series "Panyo Panyo Di Gi Charat" are named after each of the four catgirl's onomatopoeia. Piyoko talks in a similar manner.