If, for whatever reason, the highly-distinctive 'manga' art style suits your perception of a character - be it one you are playing or an NPC in a game that you are running - this selection is worth a look for ideas.
The artist (Kat Foley) has got the style down tight in this collection of pencil sketches - big eyes, small mouths, slightly awkward posture - although perhaps the noses are a bit prominent. They look slightly unfinished, but do give scope for you to use them as a basis for a more complete drawing if you prefer.
As presented, they can be printed out as actual 'cards' (backs are provided as well), or else you may want to take the character of your choice to illustrate a character sheet.
No licence details are provided (beyond normal copyright statements), so it would be safe to assume that these are purely for personal use in your games... although if they appeal, I'm sure Kat will talk to you about illustrating the product that you have in mind!