Most people already know this, but for those who don't, Bella is the new mermaid replaceing Emma in the hit show H2o Just add Water. Claire Holt ended her mermaid fanatsy with the end of season 2. She is not in the third season because she is filming an american movie, the messengers 2. Bella and Will are the two new charters in H2o. Bella is the newest mermaid said to bring new energy to the group. Will is a well trained diver who accdentily sets somthing off in the waters at Mako island that turns water against the girls.
I don't know how they will enter the show, but be prepaired for them.