This is the Movie Version of dantrekfan48's Green Lantern Persona.
Robert first got the ring due to an issue with his class ring delivery. He got a full refund when he got the ring and on top of it all, it was the wrong birth stone, emerald. He ordered topaz, but despite that, he thought it looked cooler with a green stone instead anyway, so he didn't say anything. He had the ring for two years before he noticed anything strange about it. Call him clueless. Then one summer, he headed up to Metropolis to watch a martial arts tournament his old classmates were competing in. He was challenged to a quick sparring match and dressed out. Then BrainIAC attacked. He captured Robert and his friends and put them all into stasis pods about to digitize them, then the ring activated. Blew a hole clean through the pod. It took him a while to realize it, but it wasn't just any class ring. No time to gawk at it now like a fool, he had to get my friends off the ship, and he did just that... with a little help from Superman of course. Hell of a day.
Here's the Exchange between Marisa and Robert later that day.
Marisa White is busy working on her homework when she notices a green glow coming through her window, She turns around to see the Green Lantern That Saved her life during the BrainIAC Incident flying towards her window.
"Evening Ma'am. I didn't get a chance to say good-bye. You okay?" Rob says trying to disguise his voice.
"No, I'm good, I didn't have a chance to thank you." Marisa Responded.
"Just doing my job, No thanks necessary miss--" Rob says to her.
"No No, It is. you saved my life. You saved all of our lives, that was very--" Marisa Trails off as she goes for a kiss only for Rob to back up a bit. "Rob?" She mutters.
"Miss?" Rob says still trying to disguise his voice.
"ROB?!" Marisa says surprised causing him to hang his head disappointed that the glasses didn't work. "ROB!!! Omigod Rob!" She says covering her mouth in shock.
"How'd you know it was me?" Rob asks in his normal voice.
"What do you mean?! I've known you my whole life, I've seen you naked, you think I wouldn't recognize you just because I can't see your eyes?! What is this? Why is your skin green? Why are you glowing? What the hell is with the Glasses?!" She starts questioning Rob.
"I thought they looked good on me." Rob tries to give her a good answer. "Cool Huh?" he then says with a smile.