It looks like a Fukien Tea. Carmona.
This is an older post but in case any one else is interested.
I think you are misting instead of watering. Bonsai are trees and most trees need regular water. Bonsai trees are potted in well drained (mostly gravel and not soil) soil and the root system has been restrained so it dries out fast especially if they are kept outdoors. In warm climates most bonsai trees do better living outside in full sun and watered daily and repotted every 6-12 months.
There are some plants that are suitable for indoor bonsai but they need to get enough light. Watering indoor plants really depends on the amount of air circulation they get as well as the kind of media they have. You need to learn when to water. If the leaves are drying, the plant is not getting water.
Two things will cause this. Overwatering will kill the roots and the leaves will still starve. Underwatering does the same thing.
When you do water, it needs to be thorough with the soil being evenly saturated and the media flushed to wash out accumulated salts. Use your finger to feel the soil or test the weight of the pot to know when it is time to water again.
Misting helps to add humidity but it may or may not be enough to "water" a plant depending on how you are misting. As the tree gets closer to repotting the roots will take up most of the pot space and will need even more water until it is repotted.
I use crushed black cinder (lava rock). It is cheap and easier to get and I can water my potted trees everyday without issues of root rot. I have all of my citrus and my current bougainvillea (in training) in cinder. If they are not watered at least every other day, or it does not rain enough, they will show signs of drought stress. A couple of the Kaffir limes have been in the same pot for 20 years. and the bougainvillea is about 28 years old but has been in the current pot for about a year.
https://www.bonsaiempire.com/basics/bon ... e/watering
https://www.bonsaiempire.com/basics/bon ... /repotting
Happy gardening in Hawaii. Gardens are where people grow.