It's not the strangest thing ever.
#H
rigid surge
Even seniors need someone to show them which confluence pages have the proxy details
fleet rune
It's also likely that you're the most recent person on your team to go through onboarding, making you a good fit. Do what you can and help direct him to others that can help if you get stuck.
dark jewel
i got onboarded by a junior while back. it was nice. i shared a lot of knowledge and sharpened her up a bit while she showed me the way. she did better than the medior after that ( just by not beeing stuck in routine )