Darkleaf got his name because he was a calico cat with a lot of dark patches on his fur

Deadstar has heterochromia

Sparrowtail was originally going to be a rusty brown cat

Cloudpaw was found on the border of Thunderclan’s territory and Nightfall and Sparrowtail adopted him. Bushpaw is 1 month older than him

Sixpaw has six legs because when he was born, he somehow had his littermate’s front legs, and the unnamed kit had to be put down. This is why Cottonpaw hates Sixpaw

Stitches (the blue, white and pink dark forest cat) is transmasculine

Sunspot died of blood loss. Her front legs were ripped off in battle.

Darkleaf was beheaded. How? I don’t know how the Shadowclan cats from his time built a guillotine

Fishflight (the dark forest cat with the television head) died of internal bleeding and blunt force trauma

Fishpaw (mentioned in chapter 2 during the gathering) was sacrificed by a cult

In the universe of Bushflight's Destiny, gatherings are extremely important and not showing up on time is very disrespectful to Starclan, which is why the Windclan cats didn't mourn Deadstar's death in chapter 2

Sunspot and Darkleaf were Shadowclan cats

Cloudpaw mutters the uses of herbs in his sleep

Some cats in Bushflight's Destiny create alcohol by removing the seeds from deathberries and crushing the berry part, mixing it with yarrow and adding water. Two cats, Stone, a grumpy battlescarred old man and Dusty, a wholesome little guy make BFD alcohol and sell it to rogues, loners and clan cats, in exchange for prey

Foxstar, the leader of Shadowclan was bullied by his clanmates because the leader disliked him and gave him his warrior name; Foxheart. Foxhearted is an insult used by clan cats to describe someone who is cruel/mean

Skytail went to cat hell (the dark forest) because he ate magic mushrooms and killed 5 apprentices and hid the bodies under a large patch of mushrooms

Apparently Deadstar and Foxstar were going to be villains in an early version of Bushflight's Destiny. I don't remember this, but @Chocolatebar says that it's true

Chapter 3 of Bushflight's Destiny: https://gamejolt.com/p/bfd-3-5putnyxg