Aperson who is always direct or straightforward is very

There are tons of terms that you could be looking for, but to provide clarification, I'll list out some close synonyms that mean the same as direct and straightforward
1.) Honest
2.) Plain
3.) Straight
4.) Upfront
To summarize, a person who is direct and straightforward speaks out their ideas and opinions in the open. They are upfront with their feelings and usually don't try to hide anything.

The president's only official legislative duty is to sign or veto bills.