big draw against 3 aggressors

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UltimateBet $25 NLHE (been playing at table for hours so I have decent reads, your typically loose low stakes ring game)

rinoshark is at seat 1 with $29.37
jimdogss is at seat 2 with $27.81
Hero is at seat 4 with $35.19
DanielleOT is at seat 5 with $29.12
dabookie is at seat 6 with $31.37
Brahma is at seat 7 with $26.50
alrdytaken is at seat 8 with $22.87
plazma is at seat 9 with $10.25
The button is at seat 2.

Hero posts the small blind of $0.10.
DanielleOT posts the big blind of $0.25

Hero: 6d 4d

Pre-flop:

dabookie calls. ..... loose
Brahma calls. .......... loose
alrdytaken folds.
plazma calls. ........ new short stack at the table
rinoshark raises to $0.50. ......... loose
jimdogss calls. ......... straightforward and readable player
Hero calls. ....... implied odds
DanielleOT calls. ......... passive, never seen bluffing
dabookie calls.
Brahma calls.
plazma calls.

Flop (board: Kd 4h 2d): (I have flush draw+lowpair+backdoor straight draw)

Hero checks. ....... i was planning to check raise big and call an all in if necessary
DanielleOT bets $1.25.
dabookie folds.
Brahma folds.
plazma goes all-in for $9.75.
rinoshark calls.
jimdogss folds.

Hero ????............. a pot sized bet by a Passive player in EP, then an overbet, then an overcall...what to do...??
DanielleOT left to act...