Toy Aspect

You job is to feed and pleasure your master. This involves feeding them tributes, sexually gratifying them, the works. When you have a master and pay them tribute, they grant you power so long as you continue their bidding

All toys pick a Toy Aspect, which grants additional ways to spend favor.

Choose a toy aspect.

Minuteman

You are very fast, possibly bending time. Maybe too fast.

Feed Me: In a blur of speed, you deliver tribute and pleasure to your master. You quickly grab your prey, put it where your master desires, and then return where you stood.

Worship Me: A speedy sexpert, in a burst of speed or slow time, you worship your master, then return to the battle field.

Gain the Gust Cantrip

Spend 1 Favor to cast the following:

Kinetic Jaunt, Misty Step

Dryad

You command plants, animals and birds to pleasure and deliver your master tribute.

Gain the Druidcraft Cantrip. 

Feed Me: You summon vines, or a flock of animals to deliver prey to your master.

Worship Me: You summon vines or flocks of fey to pleasure your master.

Spend 1 Favor to cast the following:

Entangle, Spike Growth

Invisible Hand

You have telekinetic powers. They can be invisible, or manifest as the image of something suitable like the outline of a hand.

Feed Me: You use your telekinetic powers deliver prey to your master. 

Worship Me: You use your telekinetic to pleasure your master.

Gain the Magehand Cantrip. 

Subordinate Kinesis:

For 1 Favor, you can cast the Telekinses spell, but it only lasts for one round.

You can increase the duration of the spell by an additional round by spending 1 Favor.

Tea Party

You are accompanied by a group of minions whose only purpose is to feed and pleasure your master. These might be captive prisoners, a group of kobolds or whatever you can think of.

Feed Me: Your minions form a line brigade to deliver prey.

Worship Me: Your minions, already in position or leaping to the job, work in concert to pleasure your master.

Gain the Friends cantrip.

Spend 1 Favor to cast the following:

Command, Suggestion

Battery Powered

You use robotics and technology to pleasure your master.

Feed Me: You use a series of robots, a food cannon, a magically powered conveyer belt or other contrivances to deliver prey to your master

Worship Me: You use a steam powered dildo, atomic onahole or some other crazy devices to please your master.

Gain the Mending cantrip. 

Spend 1 Favor to cast the following:

Catapult, Pyrotechnics

Magic Set

You use magic and the arcane arts to pleasure your master

Feed Me: You open a portal, tossing your prey through to deliver it to your master.

Worship Me: You fire a Pleasure Ray, summon a gang of devils, or a mysterious black vortex to pleasure your master.

Gain the Prestidigitation cantrip.

Spend 1 Favor to cast the following:

Tensor's Floating Disk, Vortex Warp

Action Figure

You use athleticism and strength to pleasure your master

Feed Me: You hurl your prey through the air, delivering it with accuracy to your master

Worship Me: In a burst of speed and prowess, you leap to pleasure your master, and leap back into battle.

Gain the Blade Ward cantrip.

Spend 1 Favor to cast the following:

Thunderwave, Alter Self

Condition
Endotis: You are considered inside of a creature. While inside, you have total cover from anything outside. You can still be attacked normally by the swallower, and by sexual assaults from the outside. While you are Endotis, the creature can automatically hit you with a Sexual Assault, once per turn as a free action. The creature can automatically apply the grapple and restrained conditions on you. If you break free of one of the conditions, you may end the Endotis condition and move away freely.

Your aspect should have some kind of theme. 

You learn 1 cantrip of your choice, and choose a 1st level spell and a 2nd level spell from any spell list. Certain class iconic spells and companion spells should be forbidden, like Find Familiar and Find Steed.

It can also be equivalent in power to the above option

By spending 1 Favor, you can cast these spells.

Aspects abilities should be powerful enough that players actively remember to track and allocate tribute and favor.

Debuffs from sex play are a turn off

If a toy debuffs an enemy from sex play, such as by providing disadvantage, invoking a condition or otherwise, it's a turn off.

Enemies aren't going to want to play with toys that hurt, and the idea of a 'toy with teeth', IE one that hurts when you use it just again, invokes unpleasant and unsexy imagery.

Toy

A toy is a plaything for giants. They exist to feed their vanity and make them more powerful.

Ability Save DC. Primary Ability Score + Proficiency Bonus + 8

Toy Aspect. All toys have an aspect or theme granting them a selection of abilities. Pick a Toy Aspect.

Can't Die. A toy doesn't die when unconscious and makes no death rolls.

Toys are only mechanically immortal. Fictionally, a toy can die when appropriate to the story or deliberately killed. 

Fuck Toy. Make a Sex Check with a Tyrant or Oni. You gain a +10 bonus on their roll. This player is now your Master. You become their familiar, as in the Find Familiar spell. You can still attack. While you are Endotis by your master, you can see and hear everything outside them. You gain +10 to any subsequent Sex Checks with them. You can have multiple masters.

Giant Rider. You gain the following benefits while inside your master, or within their reach

• Conduit. You grant your master immense power, like shooting lasers out of their eyes. While occupying any space on your master or inside their reach, When casting as spell or making a ranged attack, you can designate your master as the origin of the spell or attack instead of yourself.
• Howdah. Gain half cover (+2). Gain advantage to melee attack rolls against creatures smaller than your master.
• Cuddle. If you are subjected to an effect that allows you to make Dexterity saving throw to take only half damage, you instead takes no damage if you succeeds on the saving throw, and only half damage if you fail.
• My Hero. When you or your master take damage, your master can decide to allocate that damage to you or themselves after rolls and saves are made. 
• Scamper. You can easily run up and down your master's body. Once per turn as part of your movement, you can automatically place yourself anywhere within reach of your master. You do not provoke opportunity attacks with this movement. You can move inside or outside your master normally as long as you have movement to do so. If you are inside your master, you are considered Endotis.

Inside Job. The Toy and target must be at least two sizes smaller than their master. While within reach of your master, if you grapple an enemy or hit them with a attack, you may use your Scamper movement to drag them into your master's mouth/pussy/etc. Unless they make a Strength Save, they become Endotis of your master. 

Tribute. When you make a critical hit, or you kill or defeat an enemy, you can offer tribute to one of your masters. 

For each Tribute you provide, you gain 1 Favor. All Favor is lost after a short or long rest.

Choose from the following options

Feed Me.  Your master grows one size category larger. They gain temporary hit points equal to 3 times your level, and a bonus to damage equal to your proficiency bonus. This lasts until you take a short or long rest.

If you choose this option a second time or more.

The hit points and damage stack. If your master is larger than colossal your master no longer grows enough to increase a size category.

Worship Me.  Your master gains a Worship Die. When rolling a d20, they made spend a Worship Die. If the roll is lower than 10, then set the roll to 10. Otherwise to add additional d10 to the result. All Worship Die are lost after taking a short or long rest.

Favor. Favor is gained through tribute. All Favor is lost after a short or long rest.

• Good Girl(Boy). When rolling a d20, you can add 1d4 to the result by spending 1 favor.
• Free Squeeze. Spend 1 Favor. If you have the Stress Toy talent, your master may perform a Sexual Assault on you as a free reaction.
• Free Ball. Spend 1 Favor. If you have the Fastball talent, as a free reaction your master can make a thrown weapon attack against a target within 60 feet. If it hits, you deal 1d10+Str bludgeoning damage. You land next to the target in a square based on the line of attack.
• Free Use. Spend 1 Favor. If you have the Pleasurable talent, use it on your master as a free action.