Crypto - Short-Tempered
Fungus - Faithful
Nejiro - Very Absent-Minded
Netaro - Very Carefree
Musa - Very Carefree
Hiyu - Very Faithful
Zea - Very Cowardly
Kaya - Very Selfish
Bibamu - Absent-Minded
Ruscus - Faithful
Enishida - Very Absent-Minded
Denphale - Absent-Minded
Gaultheria - Short-Tempered
Hagumanoki - Absent-Minded
Salal - Cowardly
Gamuru - Selfish
Kanzou - Selfish
Ornithogalum - Very Short-Tempered
Ones I need help checking are Angios, Gymnos, Liriope, Noisy (the nicknamed Lampgera, called Jinxi/Xinxi/o in the bootleg), the Punkhouru you fight in the woods to learn to lift barrels or whatever, Gypsophi, Yarrow, Dendel, and Teletel.. also any others I might have forgotten!
Personalities with icons -
Spoiler!