Have you ever wondered what it felt like to live a life where you regretted one situation? And that one situation changed your life drastically, and you couldn't do anything to change it? Like say the most cliché one, you took a left turn and the "love-of-your-life" took a right, and you never once meet, but if you had your entire world could have been different and probably a lot more enjoyable. But you would have never known that he was a right turn away, and probably would have never regretted it, so does even make sense? No, it doesn't.
But say you did meet and happily and slowly fell in love, but that love turned dark and hurtful after so long. And that love soon ripped you apart and shattered your body to pieces, leaving you to pick up the so called mess you made. Then you could easily regret the day you meet the "love-of-your-life".
But hey that's just one situation out of a thousand, and Kali's situation is much different but is still categorized under "regretful" along with everyone else she surrounds herself with. After everything Kali's been through, will she be able to forgive her friends and family? But most importantly herself?