I think that the SSS is always enabled (given it's active in the render parameters)

 and the part you may control is how deep it goes, through each Scatter nodes (above is for Firefly and below for Superfly)
You may remark that my settings are for Superfly

I don't know Kururu but it looks pretty much like an Aiko3 or an Aiko19

𝒫𝒽𝓎𝓁

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