Eridanus

A shy ethereal being who with holds their emotions and bottles them up till they spill over cascading over their main eyes flowing and forming rivers of stars like the milkyway

Said to be the reason for the river of Styx 

When over coming with emotions and their tears become to heavy the rivers fall onto planets forming rivers or if they’re hiding on the planet their tears will also form rivers, winding and weaving

Rumors have it if you speak into a river on a clear star filled night

They will hear you and answer your questions

If your still and quiet while looking into the river you just may catch a glimpse of them in place of your reflection but once you utter a word no matter how soft they will flee, leaving ripples like a skipped stone in their escape 

may respond to music even with vocals most likely will have to be a sad song sung from the heart; full of emotions