I sit on a circle; I jump on a square.
My clothes are tailor-made, but don't really fit.
My shorter cousin's enemy is a lamp that is lit.
If you wrote down my name, I wouldn't know it was there.
Herald my going with sadness and coming with joy.
But children, please remember that I carry a tool, not a toy.
Ignoring the terrible poetry, (my bad haha) can you identify the speaker in this poem wannabe?
OK, it's been quite a while. Here's a hint:
The author's name/title is the same as a card name in the mobile game Clash Royale. There's a list here: https://statsroyale.com/cards. You can see the names by hovering over the cards with your mouse. If you are on mobile, just look up "List of Clash Royale cards". The actual riddle is not related to this game; the game just provided what I though was a good hint.
That should narrow it down some without making it too obvious, I think.