In terms of raw power, a member of a warrior known as Vegeta. He and those related to him should all be considered potentially dangerous, as they have high levels of chi power, able to cause enough damage to destroy a mountainside even while under the barrier's influence. The other one who was fighting and caused this incident has since left the village, another warrior of similar caliber known as Goku. In terms of scheming and manipulation, I would say Loki has a high likelihood of being able to figure out plans, and likely has a few schemes going. Saori is quite a talented individual, and she is similarly dangerous to Vegeta and others, and she is also a spirit and able to identify what we are.

Thankfully she seems quite content to keep that under wraps for the time being.