All the more obvious implications aside, Mirri isn't all that Simon-Cat-y beyond a few odd quirks that seems to strike his 12-year-old senioral mind every now and then. Especially if you're the only one in the house for a few days 'cause by the first evening he's managed to work out exactly who to pester every other minute until mushy food is had.
Or just to get Lap Time, 'cause that's important too!
In terms of health, not so much a 'sick' days as 'hogod-its-ridiculously-cold-outside-and-my-brain-is-dead' days.. Hence the somewhat long-ish non-update time, but honestly that's growing to be the norm with this thing x3;