Red: The female's horn develops slowly. Prefers physical attacks such as clawing and biting.Yellow: When resting deep in its burrow, its thorns always retract. This is proof that it is relaxed.Gold: When feeding its young, it first chews and tender izes the food, then spits it out for the offspring.
Prof. Lotus' Notes: The name is a portmanteau of the Japanese borrowed word for Needle - ニドル (Nedoru), cnidocyte (thing in all poisonous animals) and rhino. The rina aspect is attributed to European languages like Italian or Spanish where a denotes female names.