Room No.15 Phosphorus-chan

He lives in the room No.15 at the Periodic-Table-Apartment(PTA).

He has various color faces, and his personality changes considerably depending on the color of his face.

When his face is white (white Phosphorus-chan), it becomes frighteningly angry, and when Oxygen-tchi approaches, it emits a blue light. 
White Phosphorus-chan burned down numerous cities and people as that incendiary bullet.

When he is a black face (black Phosphorus-chan),he is the most calm.
When he is a red face (red Phosphorus-chan), he works in a match and has a task of putting on fire.

 Thus, you refer to multiple faces of the same Little Element as an allotrope.

His hobby is knitting, because he is good at knitting in spirals, he seems to have knitted the genes of living things, such as DNA.

Also, in the form of phosphoric acid, he plays an important role in raising crops. 

Without him, it would have been impossible to produce rich crops and increase population.

The three major nutrients of plants are said to be Nitrogen-tchi, phosphoric acid and Potassium-tchi.

He is one of the essential minerals of the human body.

 

Red Phosphorus-chan

 White Phosphorus-chan

Other Group 15 elements(Link is not still available)

Room No.7 Nitrogen-tchi

Room No.33 Arsenic-tchi

Room No.51 Antimony-monkey

Room No.83 Bismuth-tchi

 
  

Room No.7 Nitrogen-tchi

He lives in the room No.7 at the Periodic-Table-Apartment(PTA).

He accounts for 80 percentage in the air on your earth.

He has three arms and often makes friends with Carbon-tchi, Oxygen-tchi and Hydrogen-tchi.
If he plays with Oxygen-tchi, you call them nitrogen-Oxide, that is, NOx.
They are known as one of factors of air pollution.

When he shakes hands with three Hydrogen-tchi, they make a form of ammonia.
As you know, ammonia is detested from the mankind because it has the peculiar strange smell but it's an ingredient of urination and is also important to plant growing.

Dr. Harbor and Dr. Bosch had developed the chemical reaction which synthesizes ammonia from Nitrogen-tchi. People called the reaction a Harbor Bosch process, and upbringing of wheat became very easy by it.

He can also make a form of nitroglycerine. It is famous as angina medicine, but learned about as a chemical composition of dynamite.

Dr. Nobel established Nobel prize by the profit of the patent which invented dynamite.

Other Group 15 elements(Link is not still available)

Room No.15 Phosphorus-chan

Room No.33 Arsenic-tchi

Room No.51 Antimony-monkey

Room No.83 Bismuth-tchi