Marilene Louise Blom
Give them reasons to click. The two characters must have things in common – a hobby, a philosophy, a background.Have them be vulnerable in front of each other. Build up the tension. Write a healthy relationship. Have their friends/family see their chemistry.

How do you make a shippable character?

Shipping: 14 Ways To Develop Romance In Your Story
I can get emotionally involved in the romance of characters without actually getting emotionally involved! Put them together. Go slowly. Show that they like being together. Make them need each other for practical things. Demonstrate how confused they are.

How do you create a meaningful character?

Here are some tips for effective character development.
Develop characters who reflect your interests. Reveal their physical world through detail. Give them the right skills. Create memorable characters. Give the reader access to their inner conflict. Subvert your reader’s expectations.

Here are five ways to enhance your characters and their depth.
Give Your Characters a Personality Flaw.Give Your Characters an Addiction.Give Your Character a Physical Disability.Give Your Character a Mental Disability.Give Your Character a Secret.