Choose any characters regardless if they have been a victim in a show or not.

That is rather vague, but I'll give my best:

Misty (Pokemon)
Erza (Fairy Tail)
Izayoi Aki (5Ds)
Tea Gardener (Yugioh)
Yuzu (both Arc-V and Devil Survivor)
Sonia Strumm (Mega Man Starforce)
Melissa Chase (Milo Murphy's Law) *if you haven't seen this show, do*
Suzuna Taki (Eyeshield 21)
Red XIII's Girl
Erika
Hypno-Tan
Awake-san

And some others I can't recall.

Almost any female from Pokemon
Sailor Senshi
Princess Peach/Daisy/Rosalina
Shanti
Tsunderes
Most lolis, especially from western shows
Our Hypnohub "locals" (Hypno-tan, Erika, etc.)

Morrigan Aensland (I like her to dom, but it's really sexy to see her sub as well)
Medri's Kassidy
Saber Arturia
Caster Tamamo
Shielder Mashu
Princess Peach/Rosalina/Zelda
Samus
Any of the Sailor Scouts, but especially Mercury
Zko's Crystal
Naoto Shirogane from Persona 4 (especially if she's getting hypnotized to be more girly/feminine, either bimbo-lite or Stepfordized)
Lulu from FFX
Mitsuru Kirijo from Persona 3
Yang from RWBY
Sheena from Tales of Symphonia
Judith, Estelle, and Rita from Tales of Vesperia

Those are the ones I can think of off the top of my head at the moment. There are definitely more, but I'll have to come back and edit them in.

Jack's Red and Brownie
May from Pokemon
Gardevoir
Chihiro fujisaki
And busty girls and femboys in general

Granny Goodness from DC Comics :P

<<mavoru12.deviantart.com/art/Larcvas-656530399| This.>>

Mileena from Mortal Kombat X
Most of the female Iconic heroes from the Pathfinder books.
Fuu from Samurai Champloo.
Faye Valentine from Cowboy Bebop.
And to be honest, the chick from Bee Movie. But just the chick, no one else.

That's what I can come up with at 5:30 AM.

Tough question. Anyone else feel weird about commissioning their best favorites? I do, so when I get other people to draw stuff, I always ask for like 2nd stringers.
I guess absolute favorites would be like
Ikusaba Mukuro
Riven (LoL)
Cardcaptor Sakura
Aile (mmzx)

Hell man, way I see it, if you're gonna indulge, may as well go all the way.

Kiryuin Satsuki
Mitsuru Kirijo
Kanbaru Suruga (Who's art on here is very scarce) :(
Kiss-shot acerola orion heart under blade (ditto ^)
Asuka Langley Soryu
Rin Tohsaka


Pretty much any character who has a strong, dominating personality to be hypnotized into a submissive. (Or have myself be hypnotized to be submissive to them)

Junko Enoshima. I can already imagine it. Hypnotist guy, sick of the series' constant blabbering about hope and despair as he is, enslaves her. No more hope, no more despair. Just the desire to please. Then in Junko's head she goes "This outcome might be the most despairful of all".

Tsundere characters especially.

Miki Hosokawa (Hell Teacher Nūbē)
Rio Rollins Tachibana (Rio: Rainbow Gate!)
Hitomi (Dead Or Alive)
Tina Armstrong (Dead Or Alive)
Lisa Hamilton (Dead Or Alive)
Hikage (Senran Kagura)
Naraku (Senran Kagura)

Hmm...

Johanna (Pokemon)
Dahlia (Pokemon)
Urd (Ah My Goddess)
Esmerelda (Disney - Hunchback of Notre Dame)
Randa Duane (Batman TAS: Heart of Steel eps)
Ty Lee (Avatar)
Opal (Legend of Korra)
Emerald (RWBY)
Mindy Simmons (Simpsons)
Nabooru (LoZ)
That cute witch girl (LoZ Link Between Worlds)
Hollie (minor character from Scott Pilgrim)
Satsuki (Kill la Kill)
Aspen Matthews (Fathom)
Curie (Fallout 4)

I'm sure I'm forgetting tons of people...