I’ll go first.
A person seeks out a fey to get a warlock pact. The person doesn’t know, however, that they’re a sorcerer with strong fey ancestry that just hasn’t manifested yet. The fey obviously agrees to the “pact” and makes a ridiculous contract that the person agrees to. The person lives their entire life believing they’re a warlock when they’re actually a sorcerer. The only thing the fey did was help the person’s magicky shit manifest.
An old granny bard, based in no small part on my own grandma. She doesn’t channel her magic through song or dance, but through her sassy remarks, telling stories about her childhood, and making baked goods, sweets, and presents for her adopted grandkids (the adventuring party).
Bardic Inspiration? Reminding you how much she loves you and is proud of you. Alternatively, giving you some candy for later or promising that if you do well, she will bake you a pie or take you out for icecream for being so brave.
Healing spells? Blown kisses, band-aids, and warm cookies.
Hypnotic Pattern/Hold Person/etc? Telling a rambling story (that she forgot what the point/moral was before she even started) but the enemies are too polite to interrupt her.
Dissonant Whispers/Visious Mockery/etc? Asking when you are going to get a boyfriend/girlfriend, graduate, get married, or get a real job. Telling bad (and slightly innapropriate) jokes, for her own amusement, often messing up the punchline. Asking if you have talked your mother recently (“You know, she won’t be around forever, and I am sure she wishes you’d write more.”) Simply saying “Bless your heart.”
Party Buffs? Giving you knickknacks, homemade gifts, or old hand-me-downs she really thinks you’ll like. Passing down age-earned wisdom and giving encouragement to just try your best. Making breakfast for the party, using far too much butter, cream, and other artery clogging goodness.