Final answer:
The quotation illustrating Trujillo's concern for his appearance is his intent focus on shaving before meeting Trina, showing his meticulousness regarding his looks.
Step-by-step explanation:
The quotation that supports the central idea that Trujillo worried about his appearance can be found where it is stated, "As he stood before the mirror, intent upon his shaving, there came a roll of wheels over the cobbles in front of the house." This passage highlights Trujillo's focus on his grooming and personal appearance, which is further emphasized when he rushes to the window to see Trina upon hearing her arrival. Moreover, it is said, "He saw her get out, and as she glanced upward at his window, their eyes met." The moment underscores his desire to present himself in the best possible light upon meeting her gaze.