Additionally... I think Ranma used an attack like that in:
R-AA 'Chi Journeymage' by Multiple - [Status=Not Complete] - [Last Dld=09/23/2007] - [Size=559kb]
In the following and its offshoot thread, I think his Gatekeeper powers worked like that.
R-AA 'Gate of Light' by Multiple - [Status=Not Complete] - [Last Dld=05/05/2008] - [Size=102kb]
It is removed now, but back when TheGrum had that misposted update, Ranko had attacks that were pure life energy that acted like love in a sidestory of Breaking Chains.
In the following, Ranma had a mixed soul that had a aspect of it that drew others to him and forced them to find something to like about him that was mirrored in them, not an attack, but more like a unconsious compulsion.
R-AA 'Shared Wishes, Shared Lives' by Archangel Bloodraven - [Status=Not Complete] - [Last Dld=03/04/2006] - [Size=69kb]
There are likely a few such in:
R-SM 'Tranquility Protocols' by Mordae Durgul - [Status=Not Complete] - [Last Dld=03/21/2004] - [Size=231kb]
He discusses the possibility in chapter 24 of:
RANMA 'Aijou & Aitou JohnnyG version' by Driver Jim Ohki - [Status=Not Complete] - [Last Dld=09/29/2007] - [Size=737kb]
Additionally, I'd have to look them up, but a couple come to mind with Ranma where he plays a instrument and the emotions affect those around him. Mostly love or sadness. And one with an instrument where if plays it, affects the whether.