In research of past questions, I came across Eleos. Eleos is the personified daemon (lesser/inferior god) of piety, mercy, clemency (leniency), and compassion. She was always depicted as a young woman wearing a blue veil or dress. She was only recognized as a deity in Athens. But if one wished to be allied with Athens, they were to approach Eleos's statue/altar as a suppliant.
Her Roman form was Clementia. In 44 BCE, it's believed that Caesar had the Roman State erect a temple to her as he was keen to demonstrate his virtue. After that, not much is known.
Did other Greek/Roman cities/states have a deity they exclusively worshipped or recognized?