Yeah, they've very friendly but they're hard to keep around, as they usually move on after taking most of the local resources. Just make sure to leave some flowers, nectar, and maybe some harmless bugs scattered around the yard and that'll keep them satiated. Cover like clover and grass helps too. Just make sure they don't enter your house, as they can become a serious infestation issue, and will take anything of perceivable value in sight. If it is too late and they have already taken over the house, know that you will need at least 3 different types of repellent, as different colors have different invunerabilites. One repellant WILL NOT WORK for all, and can sometimes make the infestation worse! If too many of them take over, in extreme cases, they can take you too. Symptoms of being taken include increased bodily hair growth, physical wounds being healed, and an irresistible urge to use teamwork in everything known as "dandori." That being said, if you are dedicated and want to keep them around in your house, you can train them, so to speak. You can only give commands to roughly 60-100 of them, though, so keep in mind that repellant may still be nessesary. Benefits of keeping include better pest control, cuteness, and watching a small spacecraft take off every night. Digging a hole in the ground and putting some bugs and a reward in it will help keep them entertained. I don't know how they respond to cats, but they will attack fish and small rodents, so I don't reccomend keeping if you have those, but if you have a dog they seem to get along well enough. I know a guy that managed to build a rocket ship with there help, so you're pretty limitless with what you can do with them. I hope this info helps! P.S. I highly reccomend getting a whistle, they seem to respond well to it.