Rikuhachima Aru is depicted in a dynamic forward-leaning pose atop a compact, stylized base that evokes a futuristic campus setting. The figure features a meticulously sculpted hairstyle and a layered outfit that fuses a modern school uniform with subtle combat-ready details. A cool blue palette dominates, complemented by crisp white trims and restrained gold accents for contrast. The painterly finish uses soft shading in the folds and bright highlights along the edges to convey depth and movement. Textured fabric, smooth skin tones, and precise line work create a rich tactile impression, while the base integrates thematic elements from the Blue Archive aesthetic to anchor the character in her world.

Within the Blue Archive-inspired narrative, Rikuhachima Aru is portrayed as a calm and perceptive strategist who navigates a city where academies train students to harmonize technology, magic, and teamwork. From an early age, she showed an unusual talent for reading situations, predicting outcomes, and guiding teammates through complex investigations. As a junior investigator in a faction dedicated to restoring balance to a fractured metropolis, Aru learns to balance personal loyalty with a sense of duty, facing both rival groups and environmental hazards that test her resolve. Her story explores themes of trust, sacrifice, and the cost of knowledge, while the figure captures a defining moment of resolve just before a critical decision.