Princess

The Princess is an NPC vendor that will spawn once the following conditions have been met:
 * There is an empty house.
 * All other town NPCs (not including Santa Claus or town pets) are present, meaning that she can only spawn after defeating Plantera which is when the Cyborg NPC can move in.

Living preferences
The Princess is unique in that she does not have any biome or neighbor preferences. She loves up to three NPCs that live nearby and is liked by all NPCs around her.

She also hates being lonely and her unhappiness is maxed to 150% if she is not surrounded by at least 2 other NPCs within 25 tiles, or 2 other NPCs that are between 25 and 120 tiles away.

Interaction quotes


During the night:

When Pirate is present:

After defeating Golem:

After defeating Duke Fishron:

After defeating Frost Legion:

After defeating Pumpking:

After defeating Ice Queen:

After defeating Martian Madness:

During a Blood Moon:

During a Party:

During Rain:

During a Thunderstorm:

During a Windy Day:

When in a Graveyard:

Happiness quotes
When homeless:

When neutral:

When far from home:

When lonely:

When overcrowded:

When in an Evil biome or the Dungeon:

The Princess will also include unique quotes for each of up to three NPCs around her:

Trivia

 * Five of the Princess's names are Japanese, each of which have different meanings:
 * Ai translates to "love" (愛).
 * Hikari translates to "light" (光).
 * Hime translates to "princess" (姫).
 * Momo translates to "peach" (桃). Based on the translation, the name "Princess Momo" means "Princess Peach".
 * Yuuki translates to "courage" or "bravery" (勇気).
 * Some of the Princess's names are references to princesses from popular culture:
 * from the 1865 novel 
 * from the 1989 American animated musical fantasy movie 
 * from the 1991 American animated musical romantic fantasy movie 
 * Charlotte from the Japanese seinen manga
 * Emilia from the Japanese light novel series 
 * from the 2015 Japanese anime series 
 * (Momo; see above) and Rosetta (the Japanese name of ) from the Japanese media franchise 
 * Rosetta could also reference the 2008 American computer animated movie 
 * Sofia from the American CGI animated television series 
 * The Princess shares the name Faye with the Dryad.
 * One of the Princess' possible names is Yorai, named for Yoraiz0r, one of the lead developers of Terraria.
 * The Princess is implied to be underage. Similar to the Angler, her sprite is shorter than most other NPCs, and they share the same death message.
 * The Princess has a Happiness quote for herself: "". This quote cannot be legitimately seen in-game, since it requires two copies of the same NPCs to be alive at once.
 * Along with the Traveling Merchant, Zoologist, and Cyborg, she is among a small group of NPCs who sell a new item post-Moon Lord. The Princess's item is a Music Box (which requires the player to defeat Moon Lord after Hardmode has been activated).