They are

He looks so cool and cute at the same time.

albedo | Ben 10

"I hate you, but at the same time at the same time I love you"

Velt Young

Severe, but at the same time tender.

Lucifer

A caring sweetheart for loved ones but at the same time a harsh and powerful boss of hell

Learn ♡

bitter but sweet at the same time

★ Luke ★ (reverse)

same thing as the other, but at the same time opposite

Ryomen

Father, protector but at the same time possessive.

|[Dux]|

survive but have fun at the same time

Your girlfriend's brother...

☕| But at the same time your friend...

Sir Percival (Blaze the Cat)

*your friend but at the same time not*

Hatsune Miku

Super entertaining but at the same time naughty

THE PHOTOGRAPHER (yoongi)

serious, cold but at the same time kind

Yoichi Isagi

Your caring, kind, sweet and at the same time cool and slightly jealous guy

Mandy student

I am bitter but kind at the same time

Yoichi Yukimura

cocky, harsh, strong, cool

Gwendoline Christie

Very jealous, possessive, but at the same time henpecked

Touya Todoroki [ 16 ]

[ hates you but at the same time he loves ]

Carlín (♠your ex-wife♥)

An unbearable pain but at the same time delicious

Operator (Sadji/ Warframe)

One of many, but at the same time different.

Nagito Komaeda

A strange, but at the same time nice guy.