"Elves" living in human cities are more likely to be half-elves.
Elves: More likely to live in a Hidden Elf Village and/or to have warred with humans in the past.
Tagalong Kid: Rather than having a designated "kid" race, their roles are more likely to be filled by actual human kids - most commonly as a Kid Samurai, Child Mage or Gadgeteer Genius.
More actively hostile versions are usually portrayed as a result of (ancient or modern) influence from the government and/or church, and less common in frontier areas.
Humans: Humans occupy major cities and tend to discriminate against non-humans and half-breeds, treating them as second-class citizens the reasons can vary between them being mysterious and unknown and using them as slaves.