Reformed but Rejected/Playing With

Basic Trope: An evil character turns good, but faces mistrust from his new allies.
 * Straight: Dracone makes a Heel Face Turn, joining Hiro and his gang. The good guys are suspicious of him and generally give him a wide berth.
 * Exaggerated: When Dracone switches from evil to good, the good guys pretty much treat him as their prisoner for a long time until he's absolutely proven himself.
 * Justified: Feigning a switch to the side of good is a common strategy for the forces of evil, so the good guys have to keep their guard up in case Dracone's switch was fake.
 * Inverted: They accept Dracone almost immediately, with absolutely no questions asked.
 * Dracone was faking his conversion to the side of good, and the heroes, the general public, or both don't question it even though they should be more suspicious.
 * Subverted: Dracone announces his intent to join Hiro's side. Though Hiro starts by brutally questioning and cross-examining him, once Dracone has answered all questions honestly and thoroughly, Hiro welcomes him warmly with no suspicion.
 * Double Subverted: ...because he knows that if Dracone is going to try anything, he's not going to try while he is ostensibly on guard.
 * Parodied: Dracone feels miserable about how he Poked a Poodle, and immediately switches to the side of good, but everyone treats him as if he's a Complete Monster whose Poodle-Poking constituted a crossing of the Moral Event Horizon.
 * Deconstructed: The icy reception from the forces of good causes Dracone to return to a life of evil, this time with a new motivation to destroy Hiro's gang for their refusal to accept his new-found goodness.
 * The addition of Dracone causes a lot of tension within Hiro's group, as they can't agree whether Dracone has truly reformed or if he's just playing them for fools. The group may even be divided over this disagreement.
 * Reconstructed: But in time, he relents and realizes that they had to act like that to stay safe, and rejoins them - this time for good.
 * Dracone works to reunite the group after the split, and this act helps the dissenters accept his change.
 * Zig Zagged: Dracone decides to join the good guys. Hiro welcomes him on board warmly, but Lance isn't so receptive. Hiro is eventually swayed into distrusting Dracone just as Dracone saves Lance's baby sister, redeeming him in his eyes...
 * Averted: Dracone switching sides is treated with as much mistrust as one would expect, given what he's done to them in the past.
 * Enforced: "The boys upstairs say we need a new good guy who's edgy and who doesn't play by the rules, but I don't want to change any of our characters!" "Just have a bad guy switch to the side of good. You can also do a 'is it real?' plotline too!"
 * Lampshaded: "You'd think they'd be more receptive to a new teammate."
 * Invoked: Emperor Evulz, sensing that his right-hand man Dracone is growing bored and is possibly thinking about usurping him, suggests that he joins the side of good as The Mole, which he knows will break him to the point that he'll be a mindless puppet.
 * Exploited: As above, but with the added knowledge that the infighting created by the addition of a formerly-evil teammate will weaken the good guys enough to make them susceptible to attack.
 * Defied: "I know you've done wrong in the past, but I will give you the benefit of the doubt."
 * Discussed: Hiro: "I'm sorry Dracone, I know you're trying to do good, but we can't just forget everything you did."
 * Dracone: "I'm under no illusions. You all still don't trust me."
 * Conversed: "These guys are awfully suspicious of Dracone; it's been months since he switched sides, you'd think he'd have proven himself by now!"
 * Plotted A Perfectly Good Waste: Hiro's group refusing to accept Dracone into their group is an early hint of the group's Fantastic Racism, which is used to gray things up a bit.

How can you be so sure that the main trope has cleaned up its act?