A ball of quills is a sentence, not an insult
A pet hedgehog's defence is architecture: roughly five thousand quills that rise when the muscles under his skin contract, turning him into a hissing, popping ball that few predators persist with. A nervous hedgehog balls because your scent, your voice and your hands are all unclassified, and hedgehogs classify the world almost entirely by smell, having modest eyesight. Hissing and clicking are warnings issued before the full ball, and learning to hear them lets you slow down rather than trigger the shutdown. He is also nocturnal, so trust sessions dragged out of daytime sleep begin with a groggy, defensive animal; evenings, after he has woken and eaten, are when the real hedgehog is available.
Put your scent in the nest
Start the bond where he sleeps. Sleep with a small plain fleece near your pillow for a night, then place it in his hide; within days your smell is the smell of the safest place he knows. Sit near the enclosure in the evening talking quietly while he forages and runs his wheel, and resist picking him up for the first few evenings at all. When you do lift him, scoop from underneath with both hands rather than descending from above, and expect the ball — set him on your lap in a fleece snuggle sack or hoodie pocket and simply wait, hands still, while he decides whether the situation requires armour.
The uncurling is the lesson
Given stillness and warmth, most hedgehogs uncurl in stages: a nose pokes out and sniffs the air in rapid bursts, then a face, then waddling exploration of your lap. Stay bare-handed through this, even though early quills prickle — gloves erase the very scent he is learning and make him harder to hold securely. Once he is walking about, a small live or dried insect offered from your fingers pairs your smell with the best taste in his world. Short sessions that end with him relaxed teach faster than long ones that end with him exhausted and balled; return him while he is still exploring, and let the sack carry your scent back to the nest with him.
From armour to ankle explorations
A hedgehog who trusts you flattens his quills when he recognises your smell, unballs faster each week, and may sprawl in the relaxed sploot of a completely unworried animal on your lap. Self-anointing — frothing at the mouth and spreading scented saliva over his quills when he meets a new smell — looks alarming but is normal investigation, not illness. What does need a veterinarian is a hedgehog who stops eating, loses quills with flaky skin, wobbles when walking or stays balled and cold to the touch. Noting his wake time, how quickly he uncurled and which treats he took in KinsLe with Family Sharing gives every handler the same bare-handed, unhurried script, so his hard-won scent map of the family stays consistent.