Riiko

Riiko is the anthropomorphic Railroade guardian of Tobu Railway's Steam Locomotive No. 5, with her origins tracing back to the United Kingdom. She harbors an almost obsessive fascination with the insect world, frequently losing herself in bug-watching at the most unexpected moments. Though she comes across as self-absorbed and indifferent to others' opinions, beneath that free-spirited exterior lies a genuinely pure soul brimming with surprising wit and creative ingenuity that makes her utterly one-of-a-kind.