Luther is from the Joker Tribe, a tribe that is great at being hosts and providing fun entertainment and activities for all Fairy Penguinos. They are particular good at hosting light shows and turning light on and off with just the power of their magickal minds, charged up.
Luther is in between the height of Bell and Lil 'P. Luther has a reddish tint to the beak and feet compared to other Fairy Penguinos. It's unknown why but that probably influenced Luther's decision to wear maroon bear PJ's all the time on Earth.
Luther has red-brown eyes and gray fur just like Gurry (but they are from different tribes).
Luther loves the bear PJ's. The bear PJ's are like a protective armor that Luther wears to weather any obstacle. Luther wants to be protected on Earth as well as being warm. Within the first year of the research mission, The Northern Hemisphere Research Group sent early data on the wildlife. Luther took an immediate liking to bears, especially their round ears! Luther also saw the protective nature mother bears have towards their cubs.
With the help of Gurry and other Nursers, Luther was able to sew the bear PJ's with the two buttons. The buttons on Luther's bear PJ's are the same colour as Bell and Lil 'P, Luther's dear best friends. It's a symbolic gesture that Luther always has best buds Lil 'P and Bell nearby Luther's heart at all times.
If Bell is quirky, and Lil 'P is dutiful, then Luther is the joyous and excitable one of the group. Just like Luther's friends, Luther is immensely curious, but the curiosity is very kinesthetic. Luther moves around a lot and does the best when touching objects to understand how they work. But because Luther's bear PJ's are so heavy, Luther gets clumsy and sometimes trips, breaking things ... dropping things ... just making a disaster sometimes. Lil 'P has suggested knitting the bear PJ's in a lighter material, but Luther is very attached to THE bear PJ's.
Luther gets attached to any object that somehow forms a bond with due to interest. The Globe as seen in Episode 1: Weather or Not, Luther wanted to make a weather/constellation show to showcase the Globe and how humeens should use the strength of the constellations to guide them in their lives.
The Fairy Penguinos on Earth miss their time in space, so they revere the sky. The Globe is a manifestation of Luther's love for astronomy and the heavens above. Luther put some of the Southern Hemisphere constellations on the globe, and is able to make it glow with the intense mind bond Luther has with the Globe.