Review Detail of DaoistgNpFDz in A Bend in Time

i like it but the only thing i dont understand why did he killed profesor adric i search it and dint found that name so it was a pupet for character development wich in my opinion is ok that was a twist for me beacues i was thinking that she would be more of a defender not a killer(she killed not with coldblood tho) so my question if it can be answerd it was on character development or did something that i had missed when rowan killed proffesor edric?