Have you ever heard of the legend of the McLeod's at dunvager castle at the isle of skye scotland? To make a long story short. Supposedly, one of my ancestors was supposedly half fairy and was given a magic cloth by her fairy mother. The cloth had a special power. It would grant any wish once it's raised up to a flag pole and this can only be done three times. It's been used twice to protect themselves from enemies. So while I'm several generations apart. If you believe in fairies, then I guess I have some fairy blood in me. Not saying that this is all true. However, it is a legend that can be looked up.
in my opinion faeries can be seen as they can roam freely between the physical world and their own. Faeries are made up of energy and light which vibrate at a very high frequency. On the odd occasion they may slow down these vibrations and take a dense form so they you may be able to see them. If you meditate your vibrational rate will change so you probably be more likely to see them. Some lucky few humans are faerie blessed which means they fae favour them and show themselves to them more often. I believe i am faerie blessed and also on another rare occasion some people may have a faerie as their spirit guide, i have one and let me tell you they are wonderful to work with.