The appearance of Rikki from H2O: Just Add Water bridged the two shows, providing a sense of closure for long-time viewers.
Mimmi uses the power of the Jiao Long gold bracelet to destroy the dragon, only to discover that the dragon was actually her mother, Nerissa , who had been cursed. mako mermaids season 4eps16 top
Nerissa explains that a rebel mermaid named Aurora had spelled her into the dragon form, where she remained in a deep sleep until her children reunited. Mako Mermaids Wiki The "H2O" Connection The appearance of Rikki from H2O: Just Add