Monk is particularly Attuned, whilst SLS is an Echo forcibly (though not unwillingly) tethered to a vessel in the material plane. It's an interesting contrast, lol. I like to think Monk could help her remain more stable, hence them gifting a Karma Flower. The idea of Monk as a creature that offers Guidance to others is compelling and worth more exploration, I think.
More rambling below
The reasoning seemed to be related to their kindness and gentle spirit. I believe this suggests that people tend to see Monk as the slugcat most emblematic of these traits, or at least my followers seem to. It's an interesting observation.
I try to be kind, but I don't believe myself to be very gentle. I am a rather intense person, for better or worse. I am also not particularly spiritually attuned, unlike Monk. But we share a lack of physical strength (though I would say I am also frail). I don't really like monk that much, but reflecting upon them and their attributed traits like this makes me appreciate them more, actually. Sorry, Monk. You were my first campaign, so maybe I should remember you more fondly.
I struggled a lot with this; I have very little experience with backgrounds and compositions. thank you @ideavian for helping me. I sort of lost my mind while making this (light-hearted). I was screaming and crying and scratching and biting. (Not really). I want to be more ambitious with my work.
initially, this was meant to be part of a series of doodles talking about my thoughts on each of the main schools of thought for the poll... um. it got a little out of hand. ah well