Capture the essence of a protector of water cities in a future where civilizations thrive on floating metropolises. His attire melds the ruggedness of crocodile scales with advanced aquatic armor, adorned with Nile hieroglyphs. Eyes gleam with the depth of ancient rivers. Incorporate a shield that can control and purify water sources. Colors: Nile blue, crocodile green, and fortress gray. Capture the essence of a guardian ensuring the sanctity of water realms.