What is the nicest SCP in the world?

I'm curious to know, what exactly do you mean by the "nicest SCP in the world"? Are you referring to a specific Secure, Contain, Protect (SCP) protocol in the realm of anomalous objects or entities, as outlined in the SCP Foundation universe? If so, the term "nicest" might not be the most straightforward to apply, as SCPs are often characterized by their unusual, sometimes dangerous properties. However, if we're exploring the concept metaphorically, perhaps you're asking about an SCP that has a particularly endearing or non-threatening nature, despite its anomalous status. Could you clarify your question further, or provide some context for what you're looking for?