Raymond "Ray" Armstrong is one of the main protagonists and a part of the main group of survivors throughout the series.
He is Zero's father and is a soldier in the monsters lookout camp in Lans.

Bone attacks:
He can summon bones to his enemies with. Sometimes, he even uses a bone to act as a spear.

Yellow bones:
Yellow bones are similar to other normal bones, but the only difference is that whenever a yellow bone hits a wall, it will bounce back and be sent right back. Yellow bones can also change directions when they get send towards a target (similar to Undyne’s yellow spears).

• According to Louis, Zero acts just like how Ray acted when he was his age.

• His wife passed away when Zero was around 5 years old due to an illness that was running through town at the time.

• Zero And his father took Akai and Arron in for a few years.

• He canot use telekinesis (Blue magic) like how Sans and Papyrus can in Undertale.

• He himself and Zero are the ones who taught Akai and Arron how to use magic.