Look's like Dylan's gotten a job as an Observation Car for 20th Century Limited, the most famous train in the world! Maybe one day, he'll be promoted to Locomotive, imagine that! Locomotive for the most famous train in the world, it'd be an Otter's dream come true!
Commission for Zohaku on Furaffinity.
His human character transforms into a stealthy submarine for some sea exploration. Pretty tricky tf to draw but I like the outcome.