>>100371398Croak and Dazzler are mutates (artificial mutants like Molly Hayes parents or Magneto's Savage Land slaves) they're whole dig is they runaways who fight against drug dealers, a product of their time as they were created during Regan's war on drugs
they have "sex" now I guess but it took a long while to get there, Cloak didn't have a body per say until around Dark Reign and he would feed on the light beams Dagger produces to keep his dark mass in check.
now Cloak has been in love with Dagger since their first appearance but Dagger would hook up with anyone and everyone while sabotaging any potential relationship Cloak may get into else until around Spider-Island as she's now settled for Cloak, after they swap powers and realize how dependent they are on each other.
another piece to their puzzle is that Cloak is a hardcore superhero if he ditched Dagger he could be an Avenger, while Dagger is always looking to get out of the hero business and start a normal life.
now you're all caught up with 35 years of C&D and ready for the new book and tv show.