Olaf Animal Crossing is a villager that can live on your Island even in New Horizons.
Olaf Animal Crossing: Everything You Need to Know About the Anteater Matador
First introduced in Animal Crossing New Leaf, Olaf is a Smug-type anteater. He has long wavy hair (not unlike Michael Jackson's) that drapes over his face. He dresses in a Matador's Jacket.
Olaf uses a Spanish motif, dressed as a traditional bullfighter and having an interest in flamenco dancing. His Japanese name is Antonio, and his original catchphrases is "Olé," which was changed for the international release.
As he is a regular villager, he could randomly move to your island after you've built the three new houses for Tom Nook. If you run into him on an island tour, you can recruit him to your island by talking to him several times.
There is another way to get Olaf on your island. If you have his amiibo card, you can invite him to your campsite. After you invite him several times, you will be given the option to ask Olaf to move to your island.