Least Favorite Player could be Hilda. I do prefer Hilbert over her.
Now, Lyra, yeah she looked wrong, but Hilda was Wrong(er).
All others were pretty cool. Dawn look beautiful, her Platinum outfit made her cuter ^_^
Lucas as well was ok and cool, I gotta admit though, many people seem to forget him, including me. Eventhough he isn't noticeable at some point, he still looks cool to me.
How can I forget May, one of the best Playable characters. I LOVED HER RED R/S Outfit like crazy! I wasn't impressed with the Emerald one though yet she is still May...so I am Ok with it.
Male Characters such as Brendan, Red, etc are so memorable, they did a great job with them.
Hilda and Hilbert CREEP me out. Their Pale Skin is scary, and I do understand they were based on teens but it doesn't work well. The Cute 10 years old formula worked better IMO.
So my Final Answer: Hilda and Maybe Lyra