Pearl will still pull out an umbrella even when protected by Umbralla domes

Might not necessarily be considered a bug, but hey, would be a neat detail, and this game is a lot about details. Just add rainimmunity component checks to the nodes in the block down below, in hermitcrabbrain.

            IfNode( function() return not self.inst.sg:HasStateTag("busy") and TheWorld.state.israining and has_umbrella(self.inst) and not using_umbrella(self.inst) end, "umbrella",
                    DoAction(self.inst, EquipUmbrella, "umbrella", true )),
            IfNode( function() return not self.inst.sg:HasStateTag("busy") and not TheWorld.state.israining and using_umbrella(self.inst) end, "stop umbrella",
                    DoAction(self.inst, UnEquipHands, "stop umbrella", true )),

This won't affect her task to be given an umbrella, it's just flavor.

EDIT: this did end up causing some buggy behavior because I misinterpreted something, but it can be addressed, and it's worth taking a look as it could be exploited.

Turns out that when the game unequips something from her and gives it back to her to store it in her inventory, it will fire up a "getitem" event, which she listens to to potentially complete a task. The following block of code in her prefab could be changed from:

elseif data.item:HasTag("umbrella") and TheWorld.state.israining then
    inst.components.inventory:Equip(data.item)
    inst.components.friendlevels:CompleteTask(TASKS.GIVE_UMBRELLA)

elseif iscoat(data.item) and TheWorld.state.issnowing then
    inst.components.inventory:Equip(data.item)
    inst.components.friendlevels:CompleteTask(TASKS.GIVE_PUFFY_VEST)

To:

elseif data.item:HasTag("umbrella") then
    if TheWorld.state.israining then
        if inst.components.rainimmunity == nil then
            inst.components.inventory:Equip(data.item)
        end
        if data.src_pos then --hacky way to check to see if we received the item from someone
            inst.components.friendlevels:CompleteTask(TASKS.GIVE_UMBRELLA)
        end
    end
elseif iscoat(data.item) then
    if TheWorld.state.issnowing then
        inst.components.inventory:Equip(data.item)
        if data.src_pos then --hacky way to check to see if we received the item from someone
            inst.components.friendlevels:CompleteTask(TASKS.GIVE_PUFFY_VEST)
        end
end

As the comments I put in there suggest, the src_pos check is hacky, and could be addressed more properly, but you get the point.

All this would result in her being able to:

• Receive an umbrella while under an umbralla dome, and not equip it.
• Equip and unequip an umbrella based on being inside a dome or not.
• Give rewards even without equipping the umbrella, if she was given one (the game already verifies if she has one in her inventory or hand, to reject extra ones, although, checking for a better umbrella isn't a thing, and it could be added too).
• Ensure that if she somehow unequips an umbrella or coat while it's raining or snowing, respectively, she won't give out a reward again if she immediately equips either of those again.