If we base it on the (likely at least as there is too much material and possible homebrew to know specifically without going to Maruyamas home and stealing his probably massive stack of random papers and note scribbles falling out of a binder) D&D origins of each it would most likely more along:

Uncle Couch = High early game damage bruiser that slowly turns into a cc burst assassin as the game goes on

Sebas = Annoyingly sticky/high mobility skill and first 1/5th of the game no need to pot due to self sustain offtank

Wifebedo = STOP GOD DAMN SHOOTING HER, YOU ARE JUST MAKING HER DEALS MORE DAMAGE TO US (scream the melee as ranged dps ignores their cries and then wonders why the 5v3 turned into a 1v3) with solid aoe cc/sweep potential