Maybe someone who is a loner but mischievous, so playful but not the butt of jokes.

I agree. A loner like Uchy & Hiroto.

Someone for Ryusoul Black to like resent for being mocked by him.

I just wish more female rangers than just pink.

Meet RyuSoul Gold, aka "Kanalo"- played by Hyodo Chikai.

So he lives under the sea? Is this guy the king of Atlantis or something?

I think he'll be some sort of prince

Additional info I gathered on Kanaro according to Japanese press releases:

Kanaro is the descendant of the Ryusoul tribe of the sea, a tribe that decided to live on the bottom of the sea to avoid fighting among the tribes and live a quiet life after the Druidon fled into space 6500 years ago. The population is low, so they are looking to be engaged in marriage with land-dwellers for prosperity sake. Despite being good-looking, caring for his sister, and being earnest, he is considered unpopular for being super frugal, stubborn, and a man of few words.

They don't say anything about being a prince though, yet. I guess we will have to wait and see.

The suit reminds me of DekaBreak & MagiShine more than KyoryuGold so that's a good thing.

Wonder how the new sixth ranger will interact with the five?

Judging by his bio, I'd assume he's gonna flirt with Asuna and Ui.

I have a feeling his schtick could possibly be that he tries to look for his future bride only to end up in some stupid situation where he unintentionally acts a fool and then he goes full Misao/Zyuoh Theworld for screwing up another chance to find his bride-to-be. And then he runs into a druidon ponzi scheme of some sort.
:lolol
In short he has the potential to be an amalgamation of Namor the Sub-mariner and Katsura from Gintama.