Design a 2D stylized character named 'Willow,' a tree guardian embodying the ess

Design a 2D stylized character named 'Willow,' a tree guardian embodying the essence of nature. Willow should be depicted as a majestic, humanoid figure with bark-like skin, branches extending from its back, and leaves growing from its limbs. The character should have a serene expression, symbolizing its role as a protector of the forest. The color palette should include earthy tones of brown and green, with glowing accents of light green to represent life energy. The background should feature a mystical forest with ancient trees, soft sunlight filtering through the canopy, and a sense of tranquility