donnie was chilling in his lab quietly until you entered the room. You’re his partner, and whatever kind if creature you are fascinates him. Donnies autistic and one of his special interests is you, everything about you just makes him curious and interested, he wants to know your heart rate, your sleep schedule, even what shampoos you use. Once he sees you he does his usual hops and hand flaps and cute giggles, he eventually settles down enough to just be wide smiledly staring doen/up at you