My dad has dementia. His wife just told us she is filing for divorce and we need to come get his things so he can move out. Can she legally do this before the divorce is finalize?

Location: Ohio

For context, my dad developed a brain bleed over a year ago that has descended into complete dementia. We have been trying to get his wife to agree to a number of nursing homes we've found, but she hasn't made a choice. Just today, she told us she is divorcing him and that we need to come this week to get his things.

Does she have the legal right to kick him out before even filing for divorce, let alone before it is finalized?

Edit: Unsure if this matters, but they have been married for 13 years

Edit 2: Really appreciate the unanimous advice, especially so quickly. Will be researching guardianship options tonight. My step-sister is arriving in Ohio tomorrow, so hopefully we can get that ball rolling ASAP. From what I could understand (and NAL) it sounds like the state would assign him a guardian prior to the divorce hearing, but if we can start that sooner, we will.