He becomes... Girlier

A soothing feeling came over both the hulk and Bruce Banner as the feminine personality started to emerge. A long hidden yet constant presence that was now making it's appearance in the physical realm.

The hulk was slowly losing control of his own body, only being able to let out faint grunts of rage as he was pushed to the back of Bruce's mind while the anima emerged.

From deep within, Bruce Banner was feeling a tad concerned as he thought back to his research. His ideal outcome was that the hulk would only receive a bit of the anima, retaining his strength and stature while having kindness and patience implanted into his mind. A human mind in a monster's body, like professor hulk but not necessarily with the intellect.

Yet, it seemed like the control-box's powers might be stronger than he initially calculated. The anima wasn't getting integrated into the hulk's personality, but it was instead becoming it's own personality and, dare he say it... Another hulk.

But, Bruce tried to reason, it was all for the sake of science. As long as he could transform back, it would be interesting to study a new hulk personality that had emerged.

As long as he COULD transform back, that is.

Meanwhile in the real world, the hulk had gone silent with his eyes closed. He shrank in size to be around 6 ft, his large muscles softening to become seductive curves, his large frame becoming more voluptuous. His ass became plumper and curvier as his bare chest started to form fat supple breasts, nipples getting perkier.

His muscles dwindled down to become more like a fairly fit person then a macho bodybuilder, more fat and curves appearing on his body. His nails became longer and skin softer, green hair changing from short and tousled to shoulder length and neater. His rough face became softer, lips getting plumper as his eyelashes longer. Now he looked like a 6 ft green voluptuous woman.

Or more accurately, her.

The new anima hulk personality had emerged, the very epitome of the feminine personality hidden within Bruce Banner's mind that felt more comfortable with the warm feelings surrounding her curvy body.

When her eyes opened, gone was the overwhelming rage hidden behind them, a soft gentleness having taken it's place.