Just write naturally. memorist recognizes proper nouns and matches names from your tag library, showing suggestions as chips below your text. Tap a chip to confirm the tag. You can also type # followed by a name to tag someone explicitly — for example, #Emma, #Portland, #hiking.
If it's a new tag, memorist will ask you to classify it as a Person, Place, or Thing. Tags are created on the fly — you don't need to define them in advance. Just mention them and memorist remembers them for next time.
Entry editor showing # tag suggestions