Seeing the aura is a non Reiki technique. Ordinarily aura cannot be seen by naked eyes but one can develop this ability through practice. It can also be easily seen using special techniques that use colored screens and filters or radionic cameras. Kirlian photography is one of the techniques of taking photographs of etheric energy patterns around living things. A Russian researcher, Semyon Kirlian invented this technique in the 1940s. It is based on the concept that when an object has a high frequency electrical field around it and is grounded, a spark takes place between the object and the electrode. A special camera captures this phenomenon. The picture thus taken shows beautiful colors and patterns around the object, which are according to its energy patterns or aura. Different colors of the human aura have different interpretations about personality of the person.
Several techniques are available on Internet from which one can pick and choose. Once a person develops this ability, he/she can see the human aura easily without the help of any instrument. This makes it convenient to judge the personality of a person before beginning to deal with him/her but remember that it is a tricky matter. Developing the ability to see the aura has its own merits and demerits. Before you begin practicing, you must ask yourself if it is necessary for you to develop this ability. What real practical utility it will have? Think it over several times and see if it would be worth the time and effort required to develop this skill.