At first I thought she was an important character because of her relatively big portrait on the (European) game cover; it’s the picture you can see by collecting all paints. Obviously I was getting disappointed, and it seems I wasn’t the only one. In older topics players have speculated about a more prominent role originally planned for Camille but finally left out, and all because of that picture. Since Tengaar appears on it but neither Flik nor Ted, I wouldn’t overvalue the picture and the sizes of the character portraits. On the other hand, as you mentioned, she became a great general later, so why wouldn’t she get a story or gameplay feature which makes the player think “yeah, that girl deserves to end up a great one!”? Take Valeria as an example.
For example: She should either have extremely high skill plus a fixed double beat rune. Or her story fleshed out, like her life is saved by Cleo who is then telling her that now she is in debt, and that she must repay it by serving Tir until she (Camille herself) thinks the debt has been fully repaid. Camille would further develop admiration for girls like Valeria, Sonya and Cleo, and ultimately become a great general. I chose Cleo for this because I feel she’s under-depicted as well.
"Within the four seas, all men are brothers" Shuihu Zhuan