Riajuu translates as "someone who is interested in real things and has a successful social life". There's definitely an air of condescension to the term when you consider its usual usage. However, when it's all said and done, it's an antonym for otaku, which would be normal people or normies.
Def take care and get better.
On your note though, thats not what relief pitchers are for. A reliever is normally brought in to close out a game, usually in the 7th or 8th inning. They tend to have a narrower pitch repertoire than a starter, usually focused on throwing hard. In less common...
For those interested in the source, J-novel Club licensed it. Official translation of the title is "An Archdemon's Dilemma: How to Love Your Slave Elf Bride".
She didn't. She was called a 'riajuu'. However, since that doesn't really translate cleanly, normalfag is a meme-y way to translate it. The idea is that 'riajuu' are people with a fulfilling social life and are generally happy.