Good take: sans loves frisk
Bad take: sans hates frisk
Great take: sans set out to hate frisk but after they acted nothing but cute and sweet and considered him their best friend even when he'd done virtually nothing for them his resolve started to break. He tried to distance himself from them and view them as only the dangerous anomaly he'd first observed by threatening them but ended up just feeling awful about it. He couldnt bring himself to apologise because he's Bad with emotions but he made sure to give them a 100% honest judgement to show he does care about them and was willing to give them his workroom key if they confirmed to him outright they were time travelling, showing they were honest. Sans loves and trusts frisk despite his better judgement because he's a softy at heart no matter how much he tries to distance himself from others
