'''Basic Trope''': A child character who is introduced mid-series.
* '''Straight''': In season 5 of ''LongRunner'', Billy becomes the SixthRanger.
* '''Exaggerated''': Billy becomes a one-kid SpotlightStealingSquad
* '''Downplayed''': Billy is introduced, but is mostly a background character.
* '''Justified''':
** Alice was PutOnABus when she had a baby, but TheBusCameBack, and she now has a little boy with her.
** Billy is actually relevant to the plot.
* '''Inverted''':
** Billy was [[KidAppealCharacter part of the cast from the beginning]].
** Alternatively, a CoolOldGuy (or other adult character) is added to the roster.
* '''Subverted''':
** Billy makes his first appearance and has ADayInTheLimelight, but is then promptly PutOnABus or DemotedToExtra.
** Billy is an AscendedExtra.
** Billy is an adult.
* '''Double Subverted''':
** Billy ends up CommutingOnABus.
** The extra screen time, and/or the fact that Billy becomes the CreatorsPet, causes the audience to [[TheScrappy dislike him]].
** Billy is a ManChild, OneOfTheKids, TheDitz, and/or TheMillstone.
* '''Parodied''': ???
* '''Zig Zagged''': ???
* '''Averted''':
** No child characters are introduced.
** No new characters are introduced, period.
* '''Enforced''':
** "We need to keep our characters [[WereStillRelevantDammit "fresh"]] and possibly open up new plot possibilities".
** The {{executive|Meddling}}s thought it'd be a good idea to add a TokenMiniMoe.
* '''Lampshaded''': "Nothing has been the same since that meddling kid joined our team!"
* '''Invoked''': AliceAndBob, the two protagonists, have a baby.
* '''Exploited''': ???
* '''Defied''': ???
* '''Discussed''': ???
* '''Conversed''': ???
* '''Deconstructed''': Billy upsets the character dynamic, especially if he's the only child character, and especially if he's something of a MouthyKid or other annoyingly bratty type of kid.
* '''Played For Drama''': Billy is a LivingMacguffin.
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%% Optional items, added after Conversed, at your discretion:
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%%* '''Implied''': ???
%%* '''Reconstructed''': ???
%%* '''Plotted A Good Waste''': ???
%%* '''Played For Laughs''': ???