Here's the breakdown of these powers:
Healing hugs: It is exactly what you think it is. When Rita hugs people they are healed whether it is from minor injuries (cuts, bruises, etc.) and illnesses (fever or cold).
The limitations on this are she can only give up to five. The first two she will feel perfectly fine. The third she will begin to feel dizzy, the fourth will make her nauseous, and the fifth will make her pass out for about eight hours. She won’t be able to use the ability until the following day after hitting her limit.
When it comes to serious injuries or illness, she can only lessen the damage by 40% when she is at her very best physically. If she’s tired, hungry, etc. it will only relieve their pain.
Calming influence: If you exchange in a conversation with Rita for more than fifteen minutes while upset you will feel better regardless of what direction its going.
The limitation is it has to be in person and there will still be just the tiniest bit of doubt. That last one is so she doesn’t unleash Angelus every time she talks to Angel.
Changing food: Rita can change food into chocolate. Any drink becomes hot cocoa, any solid a chocolate bar, and soup would turn into chocolate pudding.
The limitation is she has to be craving it at the time and be in physical contact with it.
This is where your characters come in. Do you want them to have a healing hug? To be calmed down? Have their food turned into chocolate? This is the place to request it!