Clarke: she took you to the meadow Finn had showed her months ago, telling you stories of her past on the ark.
Octavia: she took you to the butterfly field, the place that was always and will be special to not only her, but you as well.
Raven: a little river while sitting on the rocks above it, dangling your feet while watching the stars above and making out constellations.
Lexa: a midnight stroll through the forest, clutching your hand while singing the grounder anthem together in a calming melody.
×××
The grounder anthem is an actually song that I have fell in love with :) just search up 'grounder anthem' and I'm sure it should pop up with the lyrics along with the English below it :)