The character described in "The Girl in Blue" by P.G. Wodehouse is a Frenchman who has a notably somber demeanor. His appearance suggests that he has been deeply troubled, possibly engaged in a futile or risky task. The imagery of searching for a gas leak with a lighted candle evokes a sense of danger and desperation, highlighting the man's deep-seated preoccupation and forlorn nature.

This portrayal emphasizes the character's melancholy, suggesting he is burdened by worries or fears. Wodehouse's choice of words paints a vivid picture of a man whose seriousness contrasts sharply with the lighter themes typically found in his works. This complexity adds depth to the character, making him intriguing within the narrative.