Personally speaking, Mari asks a lot of questions and makes sure to talk with other staff members to ensure that she's giving people correct advice, and not using her donator powers abusively. For that reason alone, I'm confident that Mari is interested in being a staff member. I don't have any real concerns, but given that this is likely Mari's first time as a staff member, she's going to need some help getting familiar with ULX. Although maybe she won't; she seems familiar enough.
That's a +1.
That's a +1.