I'm looking for mangas that are centered on bullying a strong heroine who won't put up with it. Hana Yori Dango is an ok example, but if she were physically strong as well, that'd be awesome. I love Red Lion's main lead, but the story doesn't really focus on bullying.

No ecchi, hentai, adult, smut, yuri, or yaoi please Thanks

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Perdition Prison- where there are no guards, no rules and no escape. Only the strong survive: http://perditionrp.freeforums.net/

Akuma to Love Song should work~

What about Dengeki Daisy?

Sket Dance You have to read until the mid chapters to find what you're looking for.

Teru in Dengeki Daisyis hardly strong.

idol shopping? she gender blends though

You might like:

Cynical Orange

Vitamin (SUENOBU Keiko) and Life. The heroines are initially weak, but they grow strong (in personality, not physically).

Why Do You Love Me?
dang, it me foreva to get the link to work. sheesh. well, i'm sure i can come up with more eventually

Shiritsu! Bijinzaka Joshi Koukou
Fly High! -- she's actually physically AND emotionally strong
Pika Ichi

I loved Pika Ichi and Fly High, they're both wonderful I'll definitely check out the rest of these, so far they all look really good, Thank you

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Perdition Prison- where there are no guards, no rules and no escape. Only the strong survive: http://perditionrp.freeforums.net/

Koukou Debut. It's not the major plot of the storyline, but when it happens for a chapter or two, she handles it admirably.

Kaichou wa Maid-sama

She's always bullied by protogonist... and he's also the one who saves her...

You might wanna check out W Pinch. She used to be a bully but due to an accident she forgot her 'bully' ways and she becomes the one bullied instead. But her 'bully' personality sometimes shows up due to her having a dual personality. Yeah that was a crappy summary but it's good: she's strong (in her other personality) and she's bullied (in the other personality).