I don't have the discipline to write anything long at the moment, so I'm gonna hit you with a short double-drabble (a drabble is 100 words exactly, so here's a 200 word piece). Set immediately after the prologue of Full Circle and includes a few 'borrowed' paragraphs just to set that horrific scene up.
Grief
Somewhere deep in the centre of Chakotay's being a distant roar began to build. But it was still possible to keep it at bay, connected as it was to a reality that Chakotay's heart would not accept.
"Just tell me she's not dead," Chakotay said flatly. It wasn't much, this faint possible hope, but it was enough to keep the worst from descending upon him in its full, final force.
Mark inhaled sharply, then composed himself.
"She is," he replied in a grim attempt at stoicism.
The next sound Chakotay heard was that of breaking glass as the mirror he held in his hand fell to the cobbled street, shattering.
"Wh-what? I …"
"Chakotay? Are you alright?" Mark was genuinely concerned. He looked down at the remains of the object on the floor, and went to retrieve it.
"Don't." Mark stood back up, Chakotay glaring at him. "Of all the people, it had to be you."
That touched a nerve. "Now hang on, that's not fair." It took a lot to ruffle Mark's feathers, but he wasn't here to be a verbal punching bag.
"Don't talk to me about fair!" The pain in Chakotay's voice was audible, and what few people had braved going outside after recent events were now stopping and looking in their direction.
Mark sighed heavily, rubbing his forehead. The last thing he wanted was a fight. "Look, I know it's-"
"Stop!" Chakotay could feel his whole world crumbling around him, and the peace in his heart being overrun by a grief he had not felt since the destruction of his homeworld. "You don't know anything, you don't … don't …" he tailed off, before shaking his head and heading back towards the transporter station.
"But I do," he whispered. "I already lost her once." He knelt down to retrieve the shards of glass, watching the grief-stricken man walk away.