Looks like Rinko will have four forms with two elements per form, for a total of eight.

Uniquely, her spell circle’s text translates to Latin instead of English.

Yeah, she’ll be set apart from the canon Riders

I provided some threads for ya.

I have the runic script available, so I need the actual message written, and the symbol.

You put your response directly on your page instead of in the thread. Try doing it on my page.

Anyway, this is how I picture stuff going down in the first episode.

Rinko notices Haruto fighting Minotauros and remembers his words to her, using that as her source of hope. It works, and Haruto notices this. He then decides to personally train her.

I've got more.

Fourze additions: Gentaro and Ryusei are joined by two more Riders
Wizard changes: An alternate version of Rinko who tamed Jabberwock (thus gaining a Rider form in her own right).

Here's a guide to some of the characters I've mentioned. I'll also describe their appearances.

Akiko: Mariska Manco
Mariska has short dark hair that covers her right eye. Her eyes are a pinkish color, unlike her brother's.

Shingo: Zoe Kamp
Zoe has blond hair that falls just above her shoulders and blue eyes.

Hina: Iris Kamp
Iris greatly resembles her sister, but her hair is waist-length, and her eyes are a pinkish color.

Befitting the clue I gave you earlier, Iris is the energetic sister and Zoe is the calm sister. I also made Yoko and Yuka from Ultraman Z sisters in my adaptation of that series, and they have a similar dynamic. The two pairs of sisters share design similarities as well (Zoe and Yoko's counterpart both have their hair trimmed short and wear blue, while Iris and Yuka's counterpart both have long hair and wear pink).

Thanks again for sharing them! It's very fun to see what people want to bring out of these shows and make their own.

I'm glad you enjoy my concepts.