FALL SIN: Pride
Very few are as excitable and energetic as Buckle. She can very easily get herself worked up by what seems like pretty small things to others. Any related to superheroes such as a collectible can immediately have Buckle gushing and fawning over it. If she has her eyes set on a certain collectible, she'll been relentless in getting it. Not only in that, but she can get relentless in chasing down any criminals, ghost and/or demons that get the idea of running from her. Even if they lose her, she'll be searching the area for hours.
Buckle has a penchant for flair, thanks to the superhero shows having so much of it. She tries to put a but of flair in almost everything she does. She also likes to play the dramatic role at times, sometimes without it even being called for. While that was the whole reason she died in the first place, she's found that she can now go about doing this without getting too badly hurt. This can add to her arrogance. Speak of it, she can be pretty arrogant. With her superheros always winning in the end, she believes that because she sees herself as a hero, she will always win.
Buckle grew up with her eyes glued to the TV. The masked heroes that were displayed on TV dominated her childhood. She truly admired them and wanted more than anything to become like them. She wanted to be one of the first legitimate female superheroes in Japan. While Buckle was very gifted in her science classes, extremely gifted even, she only blew through those classes so that she could sooner persue her dream. She was even offered a scholarship to pursue chemistry, but turned it down for an opportunity to join the company that created the heroes and shows she so adored.
Buckle went through audition after audition but was turned down every time. Mostly due to the fact that the studios just were not looking for a female superhero for their shows. Eventually they stopped taking Buckle's calls and actively ignored her. At one point after one instance of breaking and entering, she was even banned from the studios and given restraining orders.
However, legal was not enough to break her spirit. Buckle decided that if she could not join her heroes on the screen, she could be the first hero on the street! Buckle spent all her savings and two weeks of her time creating her vision of what she would be as a hero. She dawned the suit and took to the streets where she learned of Mob activity in the docks.
Buckle took to action to stop the criminals! ... and was immediately gunned down.
While Buckle died then, her strong urge for justice continued to live even as she inhabited Heaven as one of it's many angels. Over time she began to fully understand what it meant being an angel now and what kind of power she now had. While Buckle now had the power to actually be a super hero, there was no crime for her to fight in heaven. She started attempting to 'save' people from small things like falling over or eating something that looked bad.
Eventually, she developed something of an ego and quite the amount of Pride in herself. She started thinking of herself as invincible and gave herself a sense of duty. So much so that she became a major annoyance in heaven. Eventually, she was ousted due to her newfound pride and arrogance.
However, this seemed to be a blessing to her. Dumped out on the mean streets of Daten City filled with criminals, demons and ghosts, she found herself at home. Now she had actual villains to fight and she was happier than ever.
+ She likes superheroes. Bet you couldn't guess!
+ Her favorite meal is pizza
+ She can hook her katars to her legs
+ Every time she takes her weapons out, she keeps her "uniform" on.
+ I tried to find a techno version of this, but I couldn't so this is her transformation theme