Galen had been working on sensing others in the Force and while most in Lawrence weren't Force sensitive they still disturbed the air with their breathing and movements. Not only that but Galen had developed a knack for knowing when someone or something was watching him. Being apprenticed to Vader made that skill a necessity for survival.
Due to the light and growing darkness, Galen missed the blush on Regina's face. He had to admit she wasn't showing much if any embarrassment at being caught. In truth, he didn't mind being watched in his training. He trusted Gaia and as for Regina she had done nothing as of yet to hurt the trust he had allowed her.
Hearing her comment, he grinned a bit. "I do aim to please," he said. He moved towards her, still barely feeling the chill of the night air on his exposed skin even though his sweat was cooling quickly and making his skin cold. He stopped in front of the woman and stared at her.