They started going down hill after their album "Photosynthesize with me".

Cactusman would be the cool, kuudere member whose prickly appearance puts people off at first but then realize he's actually a good guy underneath.
Twiggyboy on the right would be the mischievous, boyish fun guy who can also be a bit of a hothead.
Sir Tulip over there would be the romantic, charming guy who likes reading and repsonding to every piece of fanmail he receives.