He lives in the room No.18 at the Periodic-Table-Apartment(PTA).
Like other noble gas elements he is a lone wolf.
Besides other elements, he is not interested in many creatures at all.
He seems to be playing with Fluorine-tchi too brute.
But, again, he likes to be alone.
When you apply high voltage to him, he will emit a purple light.
Along with Neon-tchi, he shines the light of the city at night.
However, Neon-tchi is more popular as he can show flashy red color.
He has no other characteristics than laziness, so I can not write about him any more.
that's all...
Other Group 18 elements, noble gas
Room No.36 Krypton-kun
Room No.54 Xenon-tchi
Room No.86 Radon-tchi