Kathryn
"This might take a while," He muttered to himself. The Sigford Library was huge, but he isn't surprised considering for the fact that they are millionaires no- Billionaires. As he was walking to the aisle, his shoulder nudged Hau's. "Oi watch it," He narrowed his eyes at the boy.
Charles
"Huh- you're the one who was walking when you bumped into me. You should look where you're going." He didn't realize it was Blue yet, oops. "Don't act like it isn't your fault." He said as he continued to skim through the books in the isle.
Vicki
"Excuse me but-" Before he was about to continue he noticed Hau's hand landed on the book he needed for that thesis of his. He sighed, "Heya, that was.. That was my bad." Scratching the back of his head, Blue waited for Hau's hand to leave the book.
Charles
He let go of the book. "Good, at least you acknowledge it." He continued to skim through. "You look like someone I know at the Battle Tree... Who're you?" He asked Blue. He kept looking around. Give him Alolan knowledge, he doesn't have access to Alola's libraries.
Vicki
"Battle tree? Never heard of it sorry." The guy raised his eyebrow, not having a single clue on what Hau said. Maybe Blue was so popular someone decided to copy his looks or something, which he finds flattering but creepy at the same time. He was surprised he didn't recognize his face as Blue who either known as the short term Indigo League Champion, that jerk of a Viridian Gym Leader or... Professor Oak's grandson. The Battle Tree, sounds like a low budget version of the Battle Tower. 
"I'm Blue," He simply said. "You probably know me as the kid in the boonies somewhere in Kanto. I assure I'm quite more than that," He shrugged pridefully. "Former Indigo League Champ, current gym leader and student studying abroad Kalos. How about you? Comment vous appelez-vous?" He was asked for his name but in French, just to show of some knowledge he's acquired.
Charles
"No, I know you from the Battle Tree. Red was there too!" He added. "I'm Hau, I was champion for a few minutes, haha. I'm from Alola." He told Blue. Though Blue definitely looked different. He didn't have his shades, signature black button up shirt and that 'vacation-y' look he had. "Was that French? Hm, I guess I can show off my knowledge then too!" Heehee, google translate time. Nevermind it doesn't translate right. "I'm Hau, I took part in the island challenge in Alola. It's quite different from the gym challenge! We get to experience "Classic" Gyms with our Kantonian style gym on one if the islands!" But in Hawaiian.
Marjorie
~~for a few minutes~~