I feel like all the four heavenly kings deserve happiness. I mean I like they could be great side characters. Especially nephrite. let me paint a picture of how all the kings could be redeemed. First Jadeite after all his losses at the hands of the sailor scouts he goes crazy until sailor moon reaches out to him offering kindness. Now Nephrite is probably the easiest because he already was redeemed but I felt like it was kind of rushed. My version of Nephrite has more episodes devoted to their friendship and him learning that love isn't so bad and keeps Naru safe from any harm. Next up Zoisite and kunzite After a yoma tries to kill zoisite for trying to kill tuxedo mask kunzite defends zoisite and gets gravely injured. Zoisite brings kunzite to sailor moon and begs her to heal kunzite. As the two spend time with the sailor scouts they find that the pure love between Usagi and mamoru is something beautiful. Kunzite even becomes even more of a big teddy bear with zoisite. I also headcannon when the four kings get their memories back Kunzite can't decide if he loves sailor Venus or zoisite more. He would even cry with both of them in his arms in a big bear hug because he loves them both. So this is how I would write the four heavenly kings redemptions. Hope you guys enjoyed it. 
Likes:
Neo Queen Serenity