I added the older tag for this and the sibling comic, as this is a fanart set (probably at least) 2 years after the story proper, but they don't look physically older so I'm not sure if they should be kept.
Wiki description of older tag
When a character is portrayed as older (physically) than they usually are. Often, this is a character who is normally a teenager or young adult being shown as a mature adult, or even elderly.