Kagura, because I like the bubbly type of female ranger a lot. Also, as much as I like Mio, Kagura reminded me a lot of myself.

I have a feeling that Ninninger will be popular Sentai for 3 reason

First- Ninninger is produced by Kamen Rider Gaim's Producer, Naomi Takebe
Second- It's Ninja show! Who doesn't love ninja?!
and finally
Third- BURGER!!!!

What is your 3 reason of why Ninninger will be popular Sentai show?

It's bright, fast, colorful, and fun

The mecha fights are badass

Ninjas

I liked kagura better because she was just very cheerful and always lifted everyone's spirits. Plus she was hot so that's a contribution to my choice.

She also produced Go-Busters (and a ton of other stuff) and that's far from being popular. Also, Gaim was not really popular with the target audience in Japan so... yeah.
Takebe is not a guarantee for a show to be successful.

Will Starninger NOT related to Ninninger?

Was he just a guy that Grandfather randomly pick him and possibly train him during his hiding time without Ninninger and his son's knowledge about Starninger, that's my theory about Starninger

What is your theory about Starninger? Is he a cowboy, a chef like Genta from Shinkenger?

You are given 1 random henshin device from an unknown source to be a sentai hero. WHATS IN DA BOOOOOOOXXXXXXX.

If I had to say I was lucky suit-wise, it'd be a Tensouder.
If I'd be lucky when it comes to an awesome device, it'd be a Gaburevolver.

And if I'd just go random, these are 5 things I could get by using a random number generator!
1. Accellular (Boukenger)
2. Doron changer (Kakuranger)
3. Battleceiver (Battle Fever J)
4. Dino Buckler (Zyuranger)
5. Dino Brace (Abaranger)

Actually, using a random generator on this is fun. I could do this all day!

Isn't how kyoryuger change just like diend without the dance?

Who is Diend? A rider? I have no point of reference

But my favorite changers are Gaburevolver, Ichibantou, Gokai Cellular, and the Shodo Phone