I'm just wondering, when I was reading Mermaid Melody, I saw Nina, Zero and Ichi, look on this link, :
http://www.mangafox.com/manga/mermaid_melody_pichi_pichi_pitch/v01/c003/26.html
Top left corner
And When I read Mamotte Lollipop, I see Hippo, from mermaid Melody.. See here...