Teen Krillhan.
Krilhan is the Fusion Dance of teen Gohan and Krillin from an alternate timeline.
Appearence
Krilhan has Krillin's forehead spots and gi, with Gohan's hair.
Personality
The Gohan from Krilhan's timeline is much like Goku. The Krillin is the same so when they fuse their personality is like that of adult Gohan's.