What creatures does hold person work?

Hold person works only on creatures that have the humanoid creature type. Undead is a different type. Hold monster works on any type of creature, except undead.

Does Hold person work on an ogre?

An ogre is classed as a “Large Giant” and therefore isn’t a humanoid so hold person will not work on it.

Does Hold person work on a fiend?

Hold monster works on any type of creature except undead.

Does Hold person work on demons?

No, the hold person spell only works on humanoids that are human-sized or smaller. So you can hold orcs, goblins or even a dryad, but not large creatures like ogres or dragons.

Can hold monster hold a giant?

It works on creatures of type “Humanoid”. The type is a specifically defined feature of each creature on its stat block. If the examples you gave, Lizardfolk and Bugbears have the type Humanoid so the spell works on them. Giants and Trolls have the type “Giant” so Hold Person is insufficient.

Can Hold person hold a giant?

Giants and Trolls have the type “Giant” so Hold Person is insufficient. The Monster listing on this site is very handy for listing monsters by type for things like this spell. Hold person targets creatures with the “humanoid” type only. You can use DDB to filter on Humanoid to make sure you know which is which.

Can you hold person a fey?

Since they are not Humanoids, Centaurs and Satyrs are not valid targets for Hold Person. Oath of the Ancients Paladins can turn Fey. Any spell or ability that specifically says it targets humanoids would not work on them (Hold Person), but those that target Fey will (Protection from good and evil).

Can you hold person a giant 5e?