ovl_En_Si is the Skulltula Token actor, the item dropped by Gold Skulltulas.
Debug Rom Notes
ROM: 0xEB173C (24050071) Golden Skulltula Token (You don't say...) Can be changed to another item. Unsure at this time if they still count towards a Skulltula counter.
ROM: 0xEB1828 (24050071) Repeat? I'm not sure what it could do.