Dr. Yusa Kakriko's Background

Yusa is form a unknown time line no one knows where he came form he is 2500 years old to some but he dont explain his past a lot so he keeps to him self he has a brilliant mind with a iq of 423+ and he is known for his feats and great skill of medicine and science he lost his family to a great war long ago and he dont know if his race is living beside him self he works for star fleet to help them and show the universe he is there to help others in need. Yusa Is known to cure 478 cures and treated a lot of injured in his time he study 540 years of medicine and science.Some time you find him to him self and quiet.