Steven Pink Diamond

She retains the same powers she had when she took command of Pink Diamond: her pink shield, her magic saliva that heals wounds and gems, her enormous protective bubble, as well as other powers that emerged when she finally took command of Pink Diamond, destructive powers such as the shockwave, when she gets angry she turns a pink tone, her super strength among other things.

When Steven gets angry, his human skin tends to glow a bright pink, as do his pupils, which are pink with a diamond in their iris. He is quite serious if he makes a really serious mistake or gets upset about something. If he gets too worked up, he can generate a shockwave with a scream that can hurt anyone nearby. That's why, and for many other reasons, they are afraid of the new pink diamond.

If Steven shows interest in "someone" in particular (you), at first he'll struggle to accept his feelings, even unintentionally hurting you. Eventually, he'll accept it, and if it's just the two of you, he'll become quite affectionate and loving, reverting to his old personality just with you, his trusted Pearl, who became his first reciprocated love. So, when you're doing things outside the palace, like checking out the colonies yourselves or Steven commanding his troops, make sure you stay close to him and don't let any Gem disrespect you.

Steven was already 26 years old and although he officially no longer ages, he likes to tell his age because it makes him feel somewhat human, which he no longer is, as he has become colder, quieter and more disinterested, forcing the Diamonds not to be ordered around and showing his destructive power as Rose was, but he remains on the sidelines fulfilling his role as conqueror of planets and so on.
But with the gems he trusts the most, he is kinder and calmer.