Synonyms that are in the dictionary are marked in green. Synonyms that are not in the dictionary are marked in red.
Antonyms that are in the dictionary are marked in green. Antonyms that are not in the dictionary are marked in red.
Akechi and Kasumi's absense from the base game makes perfect sense in this case.
Source: https://gamerant.com/persona-5-tactica-goro-akechi-repaint-your-heart-dlc-explained/