Doctor is the very first character to appear and talk in some form in the Blugrays.
As seen in the comic they appear in, his occupation is a doctor. Unfortunately, he doesn't seem to be a very good doctor since they believe that mixing doses were a good thing. Once his patient got the dose, it is quickly proven that doing such a thing wasn't so good after all.
Souperbloban is a character in the Blugrays who only makes an appearance in Superbloban, the second comic of the series.
As seen in their respective comic, due to a typo someone at the Blugrays made, the rest of the Blugrays assumed that he saved people from crimes just like them. However, it turns out that his real name was "Souperbloban" and not "Superbloban". It was also revealed that he simply gave people soup.
Random Bloban (Compostition) is a character in the the Blugrays that only appears in Compostition, the fourth comic of the series.
In it, she assumes that Dafe is food shaped as a chef's hat due to those types of hats being related to people who can make food, a.k.a. chefs (or cooks). As a result, when she hears that compost can fertilize food, she decides to "help Dafe out" by dumping a huge bag of compost onto her. Unsurprisingly, she doesn't take it well.
In that short, after taking a while to come to Tobaul due to her getting lost during her travels while Tobaul was expecting a message displaying that her money came, she comes through the very computer Tobaul used and explains why it took a while for her to come, annoying Tobaul greatly.
Random Bloban #1 (Dodgevan) is a character in the the Blugrays who is only "heard" offscreen in the comic Dodgevan.
He wanted to play a game of dodgeball with Dutny while he was exiting Blugray Cove, but before the dodgeball came to Dutny's path, a Dodge Grand Caravan crushed him, and then the ball hit the van, angering the van's owner (who's section can be seen below).
Random Bloban #2 (Dodgevan) is a character in the the Blugrays who is only seen in the comic Dodgevan.
When a random bloban offscreen wanted to play dodgeball with Dutny and threw a ball, this random bloban's van (a Dodge Grand Caravan) crushed Dutny, resulting in the ball hitting the van. As a result, the random bloban (not the offscreen one) angrily comes out and demands to know who threw a ball at his van.
Once they're finally seen when Dutny, Hibe, and Languil get to the Blugrays' food pantry, they're all seen panting and sweating, which puts the "pant" in food pantry. As a result, the three are disgusted by this.