This is my entry! It's a leaf-themed combat outfit:
Leaves contain chloroplasts, which are organelles in plant cells that harness light energy for photosynthesis. The concept of using leaves and maximizing outfit surface area symbolizes the absorption of light energy, providing additional power to the attack.
Hat: Sprout
Staff: Photosynthesis (The chlorophyll molecule helps deliver additional energy to the attack. It is especially powerful of this molecule hits the enemy’s weak spot).
Top: Leaf
Bottom: Sunny Leaf (comes with the leaf chain)
Shoes: Racing Leaf
Gloves (the arm sleeves): Lilac Leaf
Eyes: Amber
Hair: Botanical
Here’s a more clear drawing of the hair (outfit here not part of my entry on top):
Not an outfit, but I also designed a self-sustaining plant house, relating to leaves:
This plant house runs on glucose via glycolysis as well as hydroelectric power, it's entirely self sustaining. The plumbing system relies on water from the central vacuole.