Interesting questions.

The datatype for P6553 is already a Lexeme, not a Lexeme Form.  So likely this is a new property proposal I guess?

Existing example:

Lukas Werkmeister <- personal pronoun -> he L485, er L41653

And what you are looking for is another new property that could take Lexeme Forms instead of just Lexemes?

Example using a new property:

Lukas Werkmeister <- personal pronoun forms -> he L485-F2, er L41653-F4

What do others think of Crystal's use case?