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Please be advised that if you use the connect app, it doesn't always correctly parse links to lemmy posts. If they're not working for you, you can follow the whole plotline on my site. (These comics are in reverse chronological order, so start at the end and work backwards.)
I like to imagine Sune as someone who spends her afternoons on the sofa watching people's relationships.
I got one Sune character, a divine soul sorcerer. Here they are.
Their personality is basically Andrea Rhodea from FF7R - "be true to yourself and that's the most beautiful thing you can be", and then a lot of flirting with everything.
You already said they were a follower of Sune.