(Hard to make a story based off of it, so I went with an interview style)
A lot of things can happen during an interview. Just let your imagination run.
Here's my take to it:
"Because that was absolutely amazing! You know? You're totally my hero. For real, honest. I mean, not many others could have..."
The one talking was Erika.
About 15 minutes earlier she ambushed Dinian outside of a grocery store and introduced herself as her biggest fan. She also insisted to have a little interview to publish on her blog, to which, Dinian eventually agreed.
So far, however, not a single question had been asked. Instead Erika went on and on to over-excitedly describe her admiration to her newfound idol.
Dinian rolled her eyes, wondering if fans are always this obnoxious or if it was just her. Then she stopped paying attention to Erika's blabbing and begun thinking of a way to politely ditch the wannabe interviewer.
It was about then that the first question caught her off-guard:
"...What brings you to do all this?"
Dinian turned to look quizzically at Erika, having no idea of what she was talking about. She glanced at the groceries in the paper bag she was carrying, then looked back at Erika again.
"Well... my fridge was empty and, y'know, i do tend to get hungry every once in a while!" Dinian Awkwardly replied.
By this point, she decided that Erika had to be half-demented or something.
"Oh, you silly!" Erika chuckled: "I mean the vigilante stuff! Why do you do that?"
"Oh that!" Dinian mumbled uncomfortably, reminding herself that, since the Radical Tech incident from the week before, she was supposed to be one of the good guys. If only she knew the truth.
Dinian thought, somewhat amused, before focusing her mind on making up some credible BS.
But she wasn't in a particularly creative mood that day: "What can i say? It feels good to help people."
Dinian glanced over at Erika with the faint hope that her lame answer would prove good enough to shut her up. However, she noticed that Erika was distracted.
"That old lady is being mugged!" Erika called, directing Dinian's attention to the sidewalk across the road where a young punk was trying to pull away a purse from an elderly woman's hands.
Dinian looked at the scene with a sense of relief, glad that the crime proved to be a distraction from her own uncomfortable situation.
"Why aren't you doing something?" Erika asked to her personal hero, not hiding a slight hint of disappointment. Dinian rolled her eyes. Crap!
"Well... you see... there's other people around and... well, i figured maybe i should let them have their chances at being the hero. Can't hog it all for myself, right?"
A pause of awkward silence followed. In the meantime, the punk managed to snatch the bag off the lady's wrinkled claws and begun running.
"Doesn't look like anyone is helping!" Erika commented.
"Aye! Shame really, isn't it?" Dinian answered with the tone of voice of someone who actually couldn't care less.
Another moment of silence followed.
Erika turned to look at Dinian somewhat expectantly. Dinian sighed and handed Erika her groceries bag: "Fiiiine! I'll go catch him!"
"I'm so gonna end up killed today!" She mumbled to herself as she started running after the guy.