Plot, genre, settings, themes, symbols, characters, mood, atmosphere.
Narrative point of view - first-person
Narrative voice = language, diction, register
Unreliable narrator
Physical appearance, actions, idiolect, attitude, importance, relationships with other characters, contrasts.
Themes, motifs, symbols
Diction = connotations, imagery, metaphors, similes, personification, figurative language, onomatopoeia etc