Correct me if I'm wrong but don't you usually tag a character if even a tiny part of them is shown in the image?
Yes and no. I've seen pics tagged when only a small part of the character is visible. However this one is still vague as it could be either Katori or Kashima as their gloves and cuffs are too similar. You'd honestly need meta knowledge to even begin to know which it is and meta knowledge isn't put on pics.
Yes and no. I've seen pics tagged when only a small part of the character is visible. However this one is still vague as it could be either Katori or Kashima as their gloves and cuffs are too similar. You'd honestly need meta knowledge to even begin to know which it is and meta knowledge isn't put on pics.
At least, according to howto:tag, you're supposed to prioritize tags by prominence. You only add small things for completionist's sake. Hence, it's not technically wrong to add a character tag when all you can really see is the back of their hat when they're sitting down in the background of a crowd, but it's supposed to be much lower priority than what color of shirt a foreground character is wearing. People generally don't tag like that, though, and focus upon the tags they know best (like character tags), and may never realize things like epaulettes exist, even when they're prominently in the picture.
As my own general rule of thumb, I'd say that you should tag a character based upon the principle that tagging is meant to allow people searching for characters to find them. If someone searching for a character will find enough of the character to make it halfway worth seeing, it's worth tagging.
The back of the hat in a crowd as a cameo easter egg is still questionable by that standard, but it seems like Katori being the one training Sado in Sadism is part of the joke, here, so there's a decent case for the tag.
Now for something completely different: What is Fumizuki doing, calling someone?
The sfx says "purururu", which is the Japanese sfx for a phone ring, so yes. Presumably, the MPs, child services, Ooyodo, or possibly some other authority figure that protects the little ones.