Thinking about the Lighthouse wisps and them being helpful as well as up to mischief.
Emmrich: fitting themselves around the edges of whatever book he's reading when candles burn low, so he still has light to read by without using his own magic reserves. For mischief - yeeting said book across (or up) his study.
Manfred: knocking books Manfred's after from higher shelves so he doesn't have to clatter up a ladder, and tinkle-chirping from the general location of whatever other bits and bobs Manfred's looking for. For mischief - hiding said items or zipping off with Manfred's scarf or a glove, and it winds up a merry game of chase down the wisp.
Harding: nudging around pots so plants have all around light exposure, reducing the risk of leaf damage (let nature work alongside magic), or helping her gather up seeds that've accidentally been scattered into every Maker-damned nook and cranny. Diving in and out of soil when she's repotting to make holes and divots for her to work with. For mischief - doing this with Harding in range so there's clumps of soil and fertiliser in her hair and on her clothes, and knocking over watering cans (but not onto the plants!)
Bellara: relocating her quill whenever she misplaces it, chiming over the inkpot when she's running low during a writing session, and nudging over the next ingredient she needs when it's her turn to cook. For mischief - doodling on her face with the ink when she's sleeping, and swapping out seasonings when she's not paying attention (sugar for salt, pepper for paprika, etc)
Neve: bundling her notes back up into their proper order whenever they're knocked over, chiming over particular bits of paper to draw Neve's attention to the scribbles, and sure enough it's what she needed to spark a theory from where she's vocalised being stuck. For mischief - stealing absolutely anything not nailed down in her room. Especially her hats.
Davrin: playing with Assan and distracting him while Davrin's carving. Kicking up little whirlwinds of the wood shavings from his work, and by the time he's done there's no cleanup to be had because they've been swept out as the wisps have teased Assan into open air for some flying. For mischief - nug carving treasure hunt around the Lighthouse. And the DA equivalent of laser pointers for griffons, so Assan pounces on Davrin whenever he's daft enough to nap in his chair.
Lucanis: Spite is somewhat territorial of his Crow and their space so the wisps can't be directly helpful while they're around, but whenever Lucanis returns from an outing his yarn stash is always reorganised from the chaos Spite left it in (they know better than to interfere with anything involving an assassin's weapons, so they stick to the yarn). For mischief - playing tag with Spite around the pantry and leaving a trap somewhere, without fail, to keep Lucanis on his toes. Otherwise there's an entire bag of flour to be upended on his head (his coffee!)
Taash: the wisps learn Taash's exercise routines and become their own personal cheer squad to push for one more rep, and one more, last one! Their routine with the arm ropes, the armour, the LoF jewellery and regalia and lifting every second or third piece for Taash, in the correct order. Trailing cloth and straw and string in the air to create moving objects for Taash to practise their fire breathing on. For mischief - they can't carry a full watering can but they can carry little clay pots and bowls, and so the fire Taash has scattered around, they extinguish, and Taash relights, and they extinguish, back and forth and back and forth (until Taash isn't upset anymore, they're either a bit grumpy or laughing as they chase the wisps away)
For everyone: elfroot and potions being brought to them when needed.
