#everybody.

Chara and Bonnie get along really well together, although it def took a long time (maybe even the whole journey underground) to get to that point!

They didn't really at the start because Bonnie was the one more likely to lash out with violence + Chara's general hatred of humans made them clash a lot, and Bonnie would often (for a lack of a better term) debate and shittalk them back when they would narrate, leading to arguments.

As the journey went on it became more clear to Chara that Bonnie didn't actually want to hurt anybody, but was just lashing out of fear for themselves and Frisk and felt immense guilt about who they hurt. As even MORE saves were loaded and deaths were dealt with, Bonnie also eventually mellowed out and was more likely to hear Chara out. Eventually they reach a point where they're just annoying siblings to each other.

Chara chooses to move between haunting both Frisk and Bonnie. Frisk and Bonnie remind Chara of themselves and Asriel, although who is who changes a lot. It's a lot of love and heartache eventually.