Can it be consider as mecha, as seeing the Gauna Hoshijiro is piloting it?
I wasn't sure. Some other Benisuzume pics have the "mecha" tag, but technically it isn't mechanical, nor am I sure that Gauna Hoshijiro is really "piloting" it. If anyone thinks it should be tagged "mecha" or "guardian_(mecha)", or conversely that the "pilot" tag ought to be removed, they're welcome to say so. Or just go ahead and make the change.