YMMV / The Custard Protocol

• Diagnosed by the Audience: Percy is genuinely incapable of determining social cues, hates wearing specific types of clothes or having his routine disrupted, and hyperfixates on his work, traits of someone on the autism spectrum. The author confirmed in a Reddit AMA that he was written to be a bit autistic, so at least some of it is deliberate. Rodrigo Tabarotti might be another example, as Percy immediately connects with him and the way he thinks in a way he hasn't felt with others before.