

I don’t think it’s necessarily a bad thing. Subtle but unusual is a good way to describe it.
However, I would like to point out that if it is their branding, then the character appearing is an advertisement for the service. It’s just not very conventional or effective advertising, but they’re not making money from a vast majority of implementations, so it’s not very egregious anyway.
GUI is a generic swiss army knife. It’s easy to introduce to someone, and it has a whole array of tools ready for use. However, each of those tools is only half-decent at its job at best, and all of the tools are unwieldy. The manual is included, but it mostly tells you how to do things that are pretty obvious.
CLI is a toolbox full of quality tools and gadgets. Most people who open the box for the first time don’t even know which tools they’re looking for. In addition, each tool has a set of instructions that must be followed to a T. Those who know how to use the tools can get things done super quickly, but those who don’t know will inevitably cause some problems. Oh, but the high-detail manuals for all the tools are in the side compartment of the toolbox too.