He is a really sunshine boy.
(如果是女的）She is a really sunshine girl.
Hey!My name is sunshine girl,don't you discover it?
vigorousness，full of youthful spirity 朝气蓬勃
a boy abounding in vigor and vitality
sunny boy
有诗意一点的说法：He always arrives with sunshine.
sunny boy
shiny也是可以的
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