Natalie Sr. was a guild receptionist for sometime at the Adventurer's Guild in Flatta.

Upon Azusa's arrival in the Adventurer's Guild, Natalie greets her and after estimating the amount of money she earned for the slime crystals she turned in, has her register in the guild. To her surprise, Natalie states that her Immortality Ability is impressive.

(Source: Slime Taoshite 300 Nen Fandom Wiki)

An at-home comedy about a powerful girl who doesn’t work too hard!(⋈◍ ˃ᴗ˂ ◍)。✧♡ 
 
After dying of overwork in the real world, I’m reincarnated as an immortal witch, and I spend 300 years enjoying a relaxing life. At some point, though, I end up at level 99!
All those years spent killing slimes to make the money to pay the bills gave me a ton of experience points… Rumors of the level 99 witch spread, and soon I’m up to my ears in curious adventurers, duelist dragons, and even a monster girl calling me her mom! “This isn’t a dojo, so don’t come here to fight me…!” 
 
I’ve never been on an adventure, but I’m the strongest in the world… What’s going to happen to my relaxing life?!
 
(Source: Crunchyroll)

**Non-anime roles:**
• Libra - Memento Mori (VG)

After living a painful life as an office worker, Azusa ended her short life by dying from overworking. So when she found herself reincarnated as an undying, unaging witch in a new world, she vows to spend her days stress free and as pleasantly as possible. She ekes out a living by hunting down the easiest targets - the slimes! But after centuries of doing this simple job, she's ended up with insane powers...how will she maintain her low key life now?! 
 
(Source: Yen Press)