Celestial Destiny City is often the first or second stop for many human race players after leaving the Newbie Village, so the beautiful warrior class transfer tutor, Catherine, quickly became well-known.
Similarly, as a native of Celestial Destiny City, little Vivian wasn't very noticeable back then.
It wasn't just because she only issued simple non-mainline find-the-cat quests, unlike Catherine, whom all warriors had to approach for job transfers, but primarily because, as a child, she had a lovely foundation yet was frequently worried due to her habit of losing cats, making her not very likable.
Moreover, her "setting" by the officials was very cliché, with no background story, and she wasn't even communicative outside tasks. If the players hadn't been low on cash during early development stages, needing to exchange gold coins and being short on money for potions, even Lynn might not have paid much attention to this little sister NPC.
