Mulan and Mushu stand side by side in front of an imposing building, both with stern looks on their faces. Mushu has a bag in his hand and Mulan has her hand gently resting on his shoulder. Their expressions are serious, as if they are determined to confront whatever lies ahead of them. For color choices, I would go for a muted palette to match their serious expressions and the atmosphere. The walls of the building could be painted in a contrasting hue to bring out the details of the structure, and adding subtle touches of gold to their clothes and accessories to bring out a cheerful note and provide a gleaming contrast.