How do you get a certain players name that touches the brick then the NPC goes to them?

Good day! So, I made a script that what happens is, when the "Player" in Workspace, in studio, touches a brick, the NPC OPG goes to him and chases him until he touches the red brick. So, now that I know this works with just the Player model when testing, I am trying to get it in multiplayer online. I am having trouble getting the certain players name that touches the brick, then the NPC goes to that certain player. I know to you GetChildren in Players, but I have no idea what to do after that, any help?

LW = game.Workspace.zone.LW
Mid = game.Workspace.zone.Mid
OPG = game.Workspace.zone.OPG
RW = game.Workspace.zone.RW
z1 = game.Workspace.zone.Zones.z1
z2 = game.Workspace.zone.Zones.z2
z3 = game.Workspace.zone.Zones.z3
z4 = game.Workspace.zone.Zones.z4
opg1 = false
lw1 = false
mid1 = false
rw1 = false
z5 = game.Workspace.zone.Zones.z5
v = game.Players:GetPlayers()
f = game.Players:GetFullName()
LeftArm = game.Workspace.zone.OPG["Left Arm"]
LeftLeg = game.Workspace.zone.OPG["Left Leg"]
RightArm = game.Workspace.zone.OPG["Right Arm"]
RightLeg = game.Workspace.zone.OPG["Right Leg"]
Head = game.Workspace.zone.OPG.Head
HumanoidRootPart = game.Workspace.zone.OPG.HumanoidRootPart
Torso = game.Workspace.zone.OPG.Torso

game.Players.PlayerAdded:connect(function()
	local plr = game.Players:GetPlayers()
	local f=	game.Players:GetChildren()
		
		for i = 1, #f do
			print(f[i])
		
	end
	
end)
z1.Touched:connect(function(hit,plrtouched)
		local hum = hit.Parent:FindFirstChild("Humanoid")
		local opg = hit.Parent:FindFirstChild("OPG")
				if opg1 == false and hit.Parent:FindFirstChild("Basketball") then
						opg1 = true
						print("Found Player")
		local plr = game.Players:GetPlayers()
		local f=	game.Players:GetChildren()
				
		while opg1 == true do
			wait(0.9)
			OPG.Humanoid.WalkToPoint = game.Workspace.plrtouched.Basketball.Position - Vector3.new(5,0,3)			
							
		end
		else
			print("Did not find player")
	end	
end)


z5.Touched:connect(function(hit)
	local hum = hit.Parent:FindFirstChild("Humanoid")
	if opg1 == true and hum then
		opg1 = false
		z1.Parent = game.Lighting
		OPG.Humanoid.WalkToPoint = Vector3.new(-1.344, 13.419, -26.512)
		wait(5)
		z1.Parent = game.Workspace.zone.Zones
	else
		return false
	end
end)

So if I understand your question, you are trying to find the player based on their character. If this is what you are trying to do, there is a method for this:

As an example, let's say a player touched a block with their leg.

script.Parent.Touched:connect(function(hit) 
	-- Assuming script is inside part
	-- Hit corresponds to what touched it, in this situation, it is the leg

	local character = script.Parent -- This is the character model, the parent of the leg

	local player = game.Players:GetPlayerFromCharacter(character)
	-- This gets the corresponding player from the character model

end)

I hope that made sense, if I need to elaborate in a different manner, let me know.

GetPlayerFromCharacter Method