You are being challenged by Leader Clair and PKMN Trainer Logan!
This pair is because Clair acted as a parental guardian to Logan after his birth mother passed away. Having living in a city that is full of Dragon trainers, made sense he be under the Gym Leader of the city.
Could be worse for someone who is planning on battling them, he could be paired with Lance or both Clair and Lance and just wreck that guy's day for thinking of going against a Guardian acting as a PKMN Trainer, a Gym Leader, and a Champion.
Logan (c) Me
Clair (c) Nintendo