I used to play GH3 on PS2 a lot and i played boss battles quite frequently
One time, in another game called Soldat, when a clan was recruiting they told me to change my old nickname since it was bizarre (i was 15 yo). I was looking for inspiration and quickly came up with Lou (final boss in GH3), added ` so i would be recognised easily while also not impersonating anyone unintentionally.
Few months passed by and i saw someone on some Soldat-related IRC channel chilling with my nickname and that person wasn’t actually impersonating me (he/she used that nickname for much longer time than me since “Lou” is actually a first name which for me, as a native polish speaker, wasn’t that obvious at the time) so that huge coincidence made me come up with an addition to my nickname - 2nd boss in GH3, famous guitarist - Slash. In the end i started using LouSlash`
As time passed by, in some places/websites/games i couldn’t use ` so i drop it occasionally.
If your friend is not tech savvy person, i would go with Mint XFCE (maybe Zorin OS Lite). Surely, it will be not as lightweight as Debian, but it will be much more user friendly for him
If he actually feel comfortable tinkering with OS - along side Debian maybe Bodhi Linux or antiX? I tried both of them on one of (in)famous Intel-based netbooks with 512mb RAM and they worked quite well.