Do the others know about MT's dead kid?
They eventually know but through investigation and not asking Mango in person. This started when Mango brought some stuff that was under the name of ‘Marigold’ during the move, and how Mango carries a stuffed toy bunny/rabbit with him in the inventory.
During one of Dark’s hangout’s with Purple. He asked if anything happened to Mango, and Purple said it’s not his to tell but he did give out the date of the accident as a hint.
On the day Mango went out with Purple. Dark searched up the date in his laptop w/ Navy and Chosen, he found that there was a tragic accident at an outdoor convention years ago. The major headline of a Minecraft simulation server gone wrong causing a life of 10 year old boy. Marigold Neon. Then came the photo of the child.
There was no name of the father mentioned, only the family of the mother’s. But comparing the photo to Mango, the word Neon being a part of his name, and Purple mentioning he had lost his son who was ten. They connected the dots of what happened.
Neither of the three read any farther, as it was too personal to know. If Mango wants to tell them at his own pace, they’ll wait for him.