Tadashi Hikari

Tadashi Hikari (光正) is the father of Yuichiro Hikari and grandfather of Lan Hikari and Hub Hikari. He was a kind old man and a briliant scientist, though sadly he never got to live long enough to see the birth of his grandsons, but he would be very proud of them. Lan still loves his grandpa and wish that his grampa would have just lived a little longer to be with him.

He appeared as data in Alpha in the ending of MegaMan Battle Network 3, and in flashbacks in MegaMan Battle Network 5. In the latter, Dr. Hikari was revealed to have been developed Soulnet, which plays an important role in the plot, alongside Dr. Wily.

Trivia
Hikari (光) means Light and Tadashi (正) can mean Right, both similars to the name of his original counterpart, which is called Dr. Light and Dr. Right.