Megaera is one of the Erinyes (Furies), specifically the punisher of Infidelity. Out of her two sisters, she is the most sensitive but still has a thrill for her career, which is punishing the ones who deem fit. 

Out of her sisters, Megaera is the most sensitive and kindest. Whenever she is in distress (usually about Hades) she hides and cries her feelings out, but this method brings teasing from her sisters. She has an immense (and completely delusional) crush on Hades, and was constantly under the impression that he was interested in her, when in truth, she had constantly misinterpreted the most minor things he did, be it greeting her or sneezing, as signals. Despite her sensitive and adorable personality, she enjoys causing chaos with her sisters and goes along with all their schemes. 

Episode: https://www.webtoons.com/en/romance/lore-olympus/episode-48/viewer?title_no=1320&episode_no=52