How do I clone this Sheathe onto the Player's Torso then weld it?

Okay, so what I was aiming for is this Sheathe to be cloned onto the player's Torso and welded as soon as they spawned. These are the pictures on what I need it to look like. Front View: gyazo.com/d2dacf03a837e3c2e5f65802ea4497da Right Side View: gyazo.com/395f3f46c15ca87d96ebffab7177aec2 By the way that's my other account since I forgot the pin and I can't change the description. The Code for the Server Script inside the Gear:

--Variables for all
local par = script.Parent
local animations = par.Animations
local sounds = par.Sounds
local clones = par.Clones

--Adds KatanaSheathe to Player
game.Players.PlayerAdded:Connect(function(player)
	local char = player.Character
	local hum = char:WaitForChild("Humanoid")
	local humrp = char:WaitForChild("HumanoidRootPart")
	local torso = char:WaitForChild("Torso")
	local WC = Instance.new("WeldConstraint",torso)
	local KS = clones.KatanaSheathe:Clone()
	KS.Parent = torso
	KS.CFrame = torso.CFrame * CFrame.new(-0.75,-0.5,0)
	KS.Tranparency = 0
end)

--When Player Equips
par.Equipped:Connect(function(player)
	par.Handle.PartA.Enabled = true
	par.Handle.PartB.Enabled = true
	wait(1)
	par.Handle.PartA.Enabled = false
	par.Handle.PartB.Enabled = false
end)

--When Player Unequips
par.Unequipped:Connect(function(player)
	local char = player.Character
	local hum = char:WaitForChild("Humanoid")
	local humrp = char:WaitForChild("HumanoidRootPart")
	local torso = char:WaitForChild("Torso")
end)

I'm not good at functions so I'm just testing and checking the output every change I make. Another odd thing is that nothing appears in the output when I spawn and when I unequip the tool it says this in the output.

11:50:30.466 - Players.Mr_popscicleYT.Backpack.Katana.Sheathe:31: attempt to index nil with 'Character'

In-game the Sheathe does not appear so I'm kind of confused at this point. Am I structuring the code wrong? Parented the Sheathe to soon or is it the CFrame and Transparency?

Thanks for reading this.

Hello. The reason it errors is that the player's character hasn't loaded in yet, so player.Character would be nil. This is easy to solve. Just add a player.CharacterAdded event connected to a function. Also, there is no parameter for Tool.Unequiped. Although this is also easy it solve by having the knowledge that an unequipped tool goes in the player's backpack - a child of the player, so you can just use script.Parent.Parent.Parent. Try this:

--Variables for all
local par = script.Parent
local animations = par.Animations
local sounds = par.Sounds
local clones = par.Clones

--Adds KatanaSheathe to Player
game.Players.PlayerAdded:Connect(function(player)
	player.CharacterAdded:Connect(function(char)
		local hum = char:WaitForChild("Humanoid")
	    local humrp = char:WaitForChild("HumanoidRootPart")
	    local torso = char:WaitForChild("Torso")
	    local WC = Instance.new("WeldConstraint",torso)
	    local KS = clones.KatanaSheathe:Clone()
	    KS.Parent = torso
	    KS.CFrame = torso.CFrame * CFrame.new(-0.75,-0.5,0)
	    KS.Tranparency = 0
	end)
end)

--When Player Equips
par.Equipped:Connect(function(player)
    par.Handle.PartA.Enabled = true
    par.Handle.PartB.Enabled = true
    wait(1)
    par.Handle.PartA.Enabled = false
    par.Handle.PartB.Enabled = false
end)

--When Player Unequips
par.Unequipped:Connect(function(player)
    local char = script.Parent.Parent.Parent.Character -- The character
    local hum = char:WaitForChild("Humanoid")
    local humrp = char:WaitForChild("HumanoidRootPart")
    local torso = char:WaitForChild("Torso")
end)

Please upvote and accept this answer if it helped.