[Gokai Black]

My favorite is Shinken Yellow, because I think she is cute.
You can choose more than one sentai girls.

[Sentai Tamashii]

She is cute, in fact, both Shinkenger girls are cute, but cute just ain't cutting it when it comes up against Luka

[Den-O]

Sorry but I'm gonna have to go with Luka. Shinken Yellow is growing on me but oh dear god Luka...

[KamenRiderOOO]

Kotoha (ShinkenYellow) and Ahim (GokaiPink) ^_^

[GibsonKAGE]

Not in any order...
- Mako (ShikenPink)
- Luka (GokaiYellow)
- Jasmine (DekaYellow)
- Miu (Go-On Silver)

[Switchblade]

I haven't seen that much Sentai, but I know enough to know that character-wise I will probably always go with Luka from Gokaiger.

But if I'm asked which ones are the hottest it's easily Ayumi Kinoshita (DekaYellow) and Nao Nagasawa (HurricaneBlue).

[Sentai Tamashii]

Here is a complete list:

Goranger
========================

Lisa Komaki - Peggy Matsuyama(Momo Ranger)


JAKQ
========================

Mitchi Margaret Love - Karen Mizuki(Heart Queen)


Battle Fever J
========================

Diane Martin - Diane Martin(Miss America I)
Naomi Hag - MarÃ*a Nagisa(Miss America II)


Denjiman
========================

Akira Koizumi - Akira Momoi(Denji Pink)


Goggle V
========================

Megumi Ōgawa - Miki Momozono(Goggle Pink)


Dynaman
========================

Rei Tachibana - Sayoko Hagiwara(Dyna Pink)


Bioman
========================

Yuki Yajima - Mika Koizumi(Yellow Four I)
Sumiko Tanaka - Jun Yabuki(Yellow Four II)
Michiko Makino - Hikaru Katsuragi(Pink Five)


Changeman
========================

Hiroko Nishimoto - Sayaka Nagisa(Change Mermaid)
Mai Ooishi - Mai Tsubasa(Change Phoenix)


Flashman
========================

Youko Nakamura - Sara(Yellow Flash)
Mayumi Yoshida - Lou(Pink Flash)


Maskman
========================

Yuki Nagata - Haruka(Yellow Mask)
Kanako Maeda - Momoko(Pink Mask)


Liveman
========================

Megumi Mori - Megumi Misaki(Blue Dolphin)
Akiko Kurusu - Rui Senda/Doctor Mazenda


Turboranger
========================

Noriko Kinohara - Haruna Morikawa(Pink Turbo)
Masako Morishita - Sayoko Tsukikage/Kirika

Fiveman
========================

Kazuko Miyata - Kazumi Hoshikawa(Five Pink)
Ryou Masajima/Keiko Hayase - Remi Hoshikawa(Five Yellow)

Jetman
========================

Rika Kishida - Kaori Rokumeikan(White Swan)
Sayuri Uchida - Ako Hayasaka(Blue Swallow)
Commander Aya Odagiri - Mikiko Miki

Zyuranger
========================

Reiko Chiba - Mei(Ptera Pink)


Dairanger
========================

Natsuki Takahashi - Lin(Houou Ranger)


Kakuranger
========================

Satomi Hirose - Tsuruhime(Ninja White)


Ohranger
========================

Ayumi Asō - Juri Nijou(OhYellow)
Tamao Satō- Momo Marou(OhPink)


Carranger
========================

Yuka Motohashi - Natsumi Shinohara(Yellow Racer)
Atsuko Kurusu - Youko Yagami(Pink Racer)


Megaranger
========================

Eri Tanaka - Chisato Jogasaki(MegaYellow)
Mami Higashiyama - Miku Imamura(MegaPink)
Asami Jō - Samejima Shizuka/Shibolena, Hizumina


Gingaman
========================

Juri Miyazawa - Saya(Ginga Pink)
Kei Mizutani - Steerwoman Shelinda


GogoV
========================

Kayoko Shibata/Monika Sakaguchi - Matsuri Tatsumi(GoPink)


Timeranger
========================

Mika Katsumura - Yuuri(TimePink)
Asami Kuru - Lila

Gaoranger
========================

Mio Takeuchi - Sae Taiga(Gaowhite)
Takemi - Tetomu


Hurricanger
========================

Nao Nagasawa - Nanami Nono(Hurricane Blue)
Mio Fukuzumi - Wendinu
Asuza Yamamoto - Furabijo
Sayaka Yoshino - Princess Laiina Hime


Abaranger
========================

Aiko Itō - Ranru Itsuki(AbareYellow)
Eri Sakurai - Jannu/Mahoro
Kasumi Suzuki - Lije/Kasumi

Dekaranger
========================

Ayumi Kinoshita - Jasmine/Marika Reimon(Deka Yellow)
Mika Kikuchi - Umeko/Koume Kodou(Deka Pink)
Mako Ishino - Swan-san/Swan Shiratori(Deka Swan)
Mie Nanamori - Lisa Teagle(Deka Bright)
Chiharu Niiyama - Marie Gold(Deka Gold)


Magiranger
========================

Asami Kai - Urara Ozu(Magiblue)
Ayumi Beppu - Houka Ozu(Magipink)
Meibi Yanamouchi - Rin/Lunagel
Chiaki Horan - Nai
Tomomi Kitagami - Mea


Boukenger
========================

Haruka Suenaga - Sakura Nishihori(BoukenPink)
Chise Nakamura - Natsuki Mamiya(BoukenYellow)
Mami Yamasaki - Shizuka

Gekiranger
========================

Mina Fukui - Ran Uzaki(Gekiyellow)
Yuka Hirata - Mele


Go-Onger
========================

Rina Aizawa - Saki Rōyama(Go-On Yellow)
Yumi Sugimoto - Miu Suto(Go-On silver)
Nao Oikawa - Kegalesia

Shinkenger
========================

Rin Takanashi - Mako Shiraishi(Shinkenpink)
Suzuka Morita - Kotoha Hanaori(Shinkenyellow)
Romi Park - Dayu Usukawa
Runa NatsuiKaoru Shiba - Kaoru Shiba(Female Shinkenred)


Goseiger
========================

Rika Sato - Eri(Gosei Pink)
Niwa Mihiko - Moune(Gosei Yellow)
Sayaka Isoyama - Rasil(Movie)


Goukaiger
========================

Ichimichi Mao - Luka Millfy
Yui Koike - Ahim de Famille

[Sentai Tamashii]

Now some pictures:

http://imageshack.us/g/6/abareyellow.jpg/

[Barricade64]

In no particular order:
ShinkenPink
Magipink
GokaiPink
GokaiYellow
Go-On Silver
HurricaneBlue
DekaSwan

[ZeoRangerV]

Deka girls all the way.