Well, your OC is 40% Mary-Sue/Gary-Stew. Not too bad, honestly. However, you're on a slippery slope, and need to watch your step, or the next thing you know, you'll be writing about how Roy is gazing lovingly into your OC's bright, ocean deep, glowing, breath taking, liquid sapphire orbs, and stroking her soft, unblemished, glowing, breath taking...liquid sapphire face...? Or if it's guy you're wondering about possibly taking Winry into his arms as SHE gazes up into his bright, ocean deep, glowing, breath taking, liquid sapphire orbs, and...well. You get the point.
Why not tell me what you got? All you have to do is press that little button, right there. Right down there. You know the one. All input is appreciated! :)