Alignment
Monsters › Parts of a Stat Block · SRD 5.2.1 p. 254
The alignment specified in a monster’s stat block is a default suggestion of how to roleplay the monster, inspired by its traditional role in the game or realworld folklore. Change a monster’s alignment to suit your storytelling needs. The Neutral alignment, in particular, is an invitation for you to consider whether an individual leans toward one of the other alignments.
“Character Creation” describes the nine alignments and unaligned creatures.